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| Author | Cherednichenko, S.; Drakinskiy, V.; Baubert, J.; Lecomte, B.; Dauplay, F.; Krieg, J. M.; Delorme, Y.; Feret, A.; Hübers, H. W.; Semenov, A. D.; Gol'tsman, G. N. | ||||
| Title | 2.5 THz multipixel heterodyne receiver based on NbN HEB mixers | Type | Conference Article | ||
| Year | 2006 | Publication | Proc. SPIE | Abbreviated Journal | Proc. SPIE |
Volume  |
6275 | Issue | Pages | 62750I (1 to 11) | |
| Keywords | HEB, mixer, membrane | ||||
| Abstract | A 16 pixel heterodyne receiver for 2.5 THz has been developed based on NbN superconducting hot-electron bolometer (HEB) mixers. The receiver uses a quasioptical RF coupling approach where HEB mixers are integrated into double dipole antennas on 1.5 µm thick Si3N4/SiO2 membranes. Spherical mirrors (one per pixel) and backshort distance from the antenna have been used to design the output mixer beam profile. The camera design allows all 16 pixel IF readout in parallel. The gain bandwidth of the HEB mixers on Si3N4/SiO2 membranes was found to be 0.7÷0.9 GHz, which is much smaller than for similar devices on silicon. Application of buffer layers and use of alternative types of membranes (e.g. silicon-on-insulator) is under investigation. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 561 | |||
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| Author | Cherednichenko, S.; Khosropanah, P.; Adam, A.; Merkel, H. F.; Kollberg, E. L.; Loudkov, D.; Gol'tsman, G. N.; Voronov, B. M.; Richter, H.; Huebers, H.-W. | ||||
| Title | 1.4- to 1.7-THz NbN hot-electron bolometer mixer for the Herschel space observatory | Type | Conference Article | ||
| Year | 2003 | Publication | Proc. SPIE | Abbreviated Journal | Proc. SPIE |
| Volume |
4855 | Issue | Pages | 361-370 | |
| Keywords | NbN HEB mixers | ||||
| Abstract | NbN hot- electron bolometer mixers have reached the level of 10hv/k in terms of the input noise temperature with the noise bandwidth of 4-6 GHz from subMM band up to 2.5 THz. In this paper we discuss the major characteristics of this kind of receiver, i.e. the gain and the noise bandwidth, the noise temperature in a wide RF band, bias regimes and optimisation of RF coupling to the quasioptical mixer. We present the status of the development of the mixer for Band 6 Low for Herschel Telescope. | ||||
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| Publisher | SPIE | Place of Publication | Editor | Phillips, T.G.; Zmuidzinas, J. | |
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| Area | Expedition | Conference | Millimeter and Submillimeter Detectors for Astronomy | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1521 | |||
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| Author | Dzardanov, A.; Ekstrom, H.; Gershenzon, E.; Gol'tsman, G.; Jacobsson, S.; Karasik, B.; Kollberg, E.; Okunev, O.; Voronov, B.; Yngvesson, S. | ||||
| Title | Hot-electron superconducting mixers for 20-500 GHz operation | Type | Conference Article | ||
| Year | 1994 | Publication | Proc. Int. Conf. on Millimeter and Submillimeter Waves and Appl. | Abbreviated Journal | |
| Volume |
2250 | Issue | 4D | Pages | 276-278 |
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| Abstract | Bolometdcmucers based on Nb and NbN superconducting thin films in the resistive state have been prepared for 20, 100 GHz and 350-500 GHz operation. The mixing mechanism is presumably of electron heating origin. Our measurements indicate that a conversion loss of about 6-8 dB can rather easily be achieved, and that the noise is reasonably low. The requirements on the operation mode and on the film parameters in order to obtain small conversion losses or even gain are discussed. For NbN films the availability of nearly 1 GHz IF bandwidth is experimentally demonstrated. NbN hot-electron mucers combined with slot-line tapered antenna on Si membrane or with double-dipole antenna on SiO^ substrate have been fabricated. The devices we study are considered to be very promising for use in heterodyne receivers from microwaves to terahertz frequencies. | ||||
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| Notes | Approved | no | |||
| Call Number | RPLAB @ phisix @ | Serial | 981 | ||
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| Author | Danerud, M.; Winkler, D.; Zorin, M.; Trifonov, V.; Karasik, B.; Gershenzon, E. M.; Gol'tsman, G. N.; Lindgren, M. | ||||
| Title | Picosecond detection of infrared radiation with YBa2Cu3O7-δ thin films | Type | Conference Article | ||
| Year | 1993 | Publication | Proc. SPIE | Abbreviated Journal | Proc. SPIE |
| Volume |
2104 | Issue | Pages | 183-184 | |
| Keywords | YBCO HTS HEB detectors | ||||
| Abstract | Picosecond nonequilibrium and slow bolometric responses from a patterned high-Tc superconducting (HTS) film due toinfrared radiation were investigated using both modulation and pulse techniques. Measurements at A, = 0.85 [tm andA, = 10.6 lim have shown a similar behaviour of the response vs modulation frequency f. The responsivity of the HTS filmbased detector at f ..- 0.6-1 GHz is estimated to be 10-2 – 10-1 V/W. | ||||
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| Publisher | Spie | Place of Publication | Editor | Birch, J.R.; Parker, T.J. | |
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| Area | Expedition | Conference | 18th International Conference on Infrared and Millimeter Waves | ||
| Notes | https://inis.iaea.org/search/searchsinglerecord.aspx?recordsFor=SingleRecord&RN=25034664 | Approved | no | ||
| Call Number | 10.1117/12.2298489 | Serial | 1653 | ||
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| Author | Gershenzon, E. M.; Gol'tsman, G. N. | ||||
| Title | Hot-electron superconducting mixers | Type | Conference Article | ||
| Year | 1993 | Publication | Proc. SPIE | Abbreviated Journal | Proc. SPIE |
| Volume |
2104 | Issue | Pages | 329-330 | |
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| Abstract | The creation of low noise heterodyne receivers for frequencies above 1 THz is in the urgentneed for radio astronomy, laser spectroscopy, plasma diagnostic, etc. In this paper we discussthe nonlinear effect related to hot electrons in superconductors, and their potential use in lownoise submilimeter wave mixer. We also discuss results achieved so far as well as possible futuredevelopments. | ||||
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| Publisher | SPIE | Place of Publication | Editor | Birch, J.R.; Parker, T.J. | |
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| Area | Expedition | Conference | 18th International Conference on Infrared and Millimeter Waves | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1654 | |||
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| Author | Gol'tsman, G.; Maslennikov, S.; Finkel, M.; Antipov, S.; Kaurova, N.; Grishina, E.; Polyakov, S.; Vachtomin, Y.; Svechnikov, S.; Smirnov, K.; Voronov, B. | ||||
| Title | Nanostructured ultrathin NbN film as a terahertz hot-electron bolometer mixer | Type | Conference Article | ||
| Year | 2006 | Publication | Proc. MRS | Abbreviated Journal | Proc. MRS |
| Volume |
935 | Issue | Pages | 210 (1 to 6) | |
| Keywords | NbN HEB mixers | ||||
| Abstract | Planar spiral antenna coupled and directly lens coupled NbN HEB mixer structures are studied. An additional MgO buffer layer between the superconducting film and Si substrate is introduced. The buffer layer enables us to increase the gain bandwidth of a HEB mixer due to better acoustic transparency. The gain bandwidth is widened as NbN film thickness decreases and amounts to 5.2 GHz. The noise temperature of antenna coupled mixer is 1300 and 3100 K at 2.5 and 3.8 THz respectively. The structure and composition of NbN films is investigated by X-ray diffraction spectroscopy methods. Noise performance degradation at LO frequencies more than 3 THz is due to the use of a planar antenna and signal loss in contacts between the antenna and the sensitive NbN bridge. The mixer is reconfigured for operation at higher frequencies in a manner that receiver’s noise temperature is only 2300 K (3 times of quantum limit) at LO frequency of 30 THz. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0272-9172 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1440 | |||
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| Author | Chulkova, G.; Milostnaya, I.; Tarkhov, M.; Korneev, A.; Minaeva, O.; Voronov, B.; Divochiy, A.; Gol'tsman, G.; Kitaygorsky, J.; Pan, D.; Sobolewski, R. | ||||
| Title | Superconducting single-photon nanostructured detectors for advanced optical applications | Type | Conference Article | ||
| Year | 2006 | Publication | Proc. Symposium on Photonics Technologies for 7th Framework Program | Abbreviated Journal | |
| Volume |
400 | Issue | Pages | ||
| Keywords | SSPD, SNSPD | ||||
| Abstract | We present superconducting single-photon detectors (SSPDs) based on NbN thin-film nanostructures and operated at liquid helium temperatures. The SSPDs are made of ultrathin NbN films (2.5-4 nm thick, Tc= 9-11K) as meander-shaped nanowires covering the area of 10× 10 µm2. Our detectors are operated at the temperature well below the critical temperature Tc and are DC biased by a current Ib close to the meander critical current Ic. The operation principle of the detector is based on the use of the resistive region in a narrow ultra-thin superconducting stripe upon the absorption of an incident photon. The developed devices demonstrate high sensitivity and response speed in a broadband range from UV to mid-IR (up to 6 µm), making them very attractive for advanced optical technologies, which require efficient detectors of single quanta and low-density optical radiation. | ||||
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| Notes | Approved | no | |||
| Call Number | RPLAB @ sasha @ chulkova2006superconducting | Serial | 1021 | ||
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| Author | Verevkin, A.; Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G.; Chulkova, G. M.; Smirnov, K. S.; Sobolewski, R. | ||||
| Title | Direct measurements of energy relaxation times in two-dimensional structures under quasi-equilibrium conditions | Type | Conference Article | ||
| Year | 2002 | Publication | Mater. Sci. Forum | Abbreviated Journal | Mater. Sci. Forum |
| Volume |
384-3 | Issue | Pages | 107-116 | |
| Keywords | 2DEG, AlGaAs/GaAs | ||||
| Abstract | A new microwave technique was successfully applied for direct studies of energy relaxation times in two-dimensional AlGaAs/GaAs structures under quasi-equilibrium conditions in the nanosecond and picosecond time scale. We report our results of energy relaxation time measurements in the temperature range 1.6-50 K, in quantum Hall effect regime in magnetic fields up to 4 T. | ||||
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| Area | Expedition | Conference | Materials Science Forum | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1536 | |||
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| Author | Semenov, A. D.; Hübers, H.-W.; Richter, H.; Birk, M.; Krocka, M.; Mair, U.; Smirnov, K.; Gol'tsman, G. N.; Voronov, B. M. | ||||
| Title | 2.5 THz heterodyne receiver with NbN hot-electron-bolometer mixer | Type | Journal Article | ||
| Year | 2002 | Publication | Phys. C: Supercond. | Abbreviated Journal | Phys. C: Supercond. |
| Volume |
372-376 | Issue | Pages | 448-453 | |
| Keywords | NbN HEB mixers, applications | ||||
| Abstract | We describe a 2.5 THz heterodyne receiver for applications in astronomy and atmospheric research. The receiver employs a superconducting NbN phonon-cooled hot-electron-bolometer mixer and an optically pumped far-infrared gas laser as local oscillator. 2200 K double sideband mixer noise temperature was measured at 2.5 THz across a 1 GHz intermediate frequency bandwidth centred at 1.5 GHz. The total conversion losses were 17 dB. The mixer response was linear at load temperatures smaller than 400 K. The receiver was tested in the laboratory environment by measuring the methanol line in emission. Observed pressure broadening confirms the true heterodyne detection regime of the mixer. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4534 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1526 | |||
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| Author | Cherednichenko, S.; Kroug, M.; Merkel, H.; Khosropanah, P.; Adam, A.; Kollberg, E.; Loudkov, D.; Gol'tsman, G.; Voronov, B.; Richter, H.; Huebers, H.-W. | ||||
| Title | 1.6 THz heterodyne receiver for the far infrared space telescope | Type | Journal Article | ||
| Year | 2002 | Publication | Phys. C: Supercond. | Abbreviated Journal | Phys. C: Supercond. |
| Volume |
372-376 | Issue | Pages | 427-431 | |
| Keywords | NbN HEB mixers, applications | ||||
| Abstract | A low noise heterodyne receiver is being developed for the terahertz range using a phonon-cooled hot-electron bolometric mixer based on 3.5 nm thick superconducting NbN film. In the 1–2 GHz intermediate frequency band the double-sideband receiver noise temperature was 450 K at 0.6 THz, 700 K at 1.6 THz and 1100 K at 2.5 THz. In the 3–8 GHz IF band the lowest receiver noise temperature was 700 K at 0.6 THz, 1500 K at 1.6 THz and 3000 K at 2.5 THz while it increased by a factor of 3 towards 8 GHz. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4534 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1527 | |||
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| Author | Verevkin, A. A.; Ptitsina, N. G.; Chulcova, G. M.; Gol'tsman, G. N.; Gershenzon, E. M.; Yngvesson, K. S. | ||||
| Title | Direct measurements of energy relaxation time of electrons in AlGaAs/GaAs heterostructures under quasi-equilibrium conditions | Type | Journal Article | ||
| Year | 1996 | Publication | Surface Science | Abbreviated Journal | Surface Science |
| Volume |
361-362 | Issue | Pages | 569-573 | |
| Keywords | 2DEG, AlGaAs/GaAs heterostructures | ||||
| Abstract | For the first time, results are presented of a direct measurement of the energy relaxation time τε of 2D electrons in an AlGaAs/GaAs heterojunction at T = 1 and 5–20 K. A weak temperature dependence of τε for the T > 4K range and a linear temperature dependence of the reciprocal of τε for T < 4K have been observed. The linear dependence τε−1 ≈ T in the Bloch-Gruneisen regime is direct evidence of the predominance of the piezo-electric mechanism of electron-phonon interaction in non-elastic electron scattering processes. The values of τε in this regime are in very good agreement with the results of the Karpus theory. At higher temperatures, where the deformation-potential scattering becomes noticeable, a substantial disagreement between the experimental data and the theoretical results is observed. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0039-6028 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1609 | |||
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| Author | Cherednichenko, S.; Rönnung, F.; Gol'tsman, G.; Kollberg, E.; Winkler, D. | ||||
| Title | YBa2Cu3O7−δ hot-electron bolometer mixer | Type | Journal Article | ||
| Year | 2000 | Publication | Phys. C: Supercond. | Abbreviated Journal | Phys. C: Supercond. |
| Volume |
341-348 | Issue | Pages | 2653-2654 | |
| Keywords | YBCO HTS HEB mixers | ||||
| Abstract | We present an investigation of hot-electron bolometric mixer based on YBa2Cu3O7−δ (YBCO) superconducting thin film. Mixer conversion loss, absorbed local oscillator power and intermediate frequency bandwidth was measured at the local oscillator frequency 600 GHz. The fabrication technique for nanoscale YBCO hot-electron bolometer (HEB) mixer integrated into planar antenna structure is described. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4534 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1552 | |||
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| Author | Karasik, B.S.; Milostnaya, I.I.; Zorin, M.A.; Elantev, A.I.; Gol'tsman, G.N.; Gershenzon, E.M. | ||||
| Title | Subnanosecond S-N and N-S switching of YBCO film induced by current pulse | Type | Journal Article | ||
| Year | 1994 | Publication | Phys. C: Supercond. | Abbreviated Journal | Phys. C: Supercond. |
| Volume |
235-240 | Issue | Pages | 1981-1982 | |
| Keywords | YBCO HTS switches | ||||
| Abstract | A transition of YBCO bridge 60 nm thick from superconducting to normal state induced by an abrupt current step has been studied. A subnanosecond stage has been observed during both S-N and N-S transition. The data obtained can be explained by hot-electron phenomena. On the basis of experimental results a prediction of picosecond switch performance has been made. | ||||
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| ISSN | 0921-4534 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1633 | |||
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| Author | Gol'tsman, G. N.; Kouminov, P.; Goghidze, I.; Gershenzon, E. M. | ||||
| Title | Nonequilibrium kinetic inductive response of YBaCuO thin films to low-power laser pulses | Type | Journal Article | ||
| Year | 1994 | Publication | Phys. C: Supercond. | Abbreviated Journal | Phys. C: Supercond. |
| Volume |
235-240 | Issue | Pages | 1979-1980 | |
| Keywords | YBCO HTS KID | ||||
| Abstract | Transient non-equilibrium kinetic inductive voltage response of YBaCuO thin films to 20 ps pulses of YAG:Nd laser radiation with 0.63 μm and 1.5 μm wavelength has been revealed. By increasing the sensitivity of 100 ps resolution time registration system and diminishing light intensity (fluence 0.1-1 μJ2/cm2) and transport current (density j≤105 A/cm2) we observed a perculiar bipolar signal form with nearly equal amplitudes of each sign. The integration of the kinetic inductive response over time gives the result which is qualitatively of the same form as the response in the resistive and normal states: nonequilibrium picosecond scale component followed by bolometric nanosecond. Nonequilibrium response is interpreted as suppression of order parameter by excess of quasiparticles followed by a change in resistance in the resistive state and kinetic inductance in superconductive state. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4534 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1634 | |||
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| Author | Gousev, Y. P.; Semenov, A. D.; Gol'tsman, G. N.; Sergeev, A. V.; Gershenzon, E. M. | ||||
| Title | Electron-phonon interaction in disordered NbN films | Type | Journal Article | ||
| Year | 1994 | Publication | Phys. B Condens. Mat. | Abbreviated Journal | Phys. B Condens. Mat. |
| Volume |
194-196 | Issue | Pages | 1355-1356 | |
| Keywords | NbN films | ||||
| Abstract | Electron-phonon interaction time has been investigated in disordered films of NbN. A temperatures below 5.5 K tau_eph ~ T -1"6 which is attributed to the renormalisation of phonon spectrum in thin films. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4526 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1649 | |||
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| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Gogidze, I. G.; Semenov, A. D.; Sergeev, A. V. | ||||
| Title | Processes of electron-phonon interaction in thin YBaCuO films | Type | Journal Article | ||
| Year | 1991 | Publication | Phys. C: Supercond. | Abbreviated Journal | Phys. C: Supercond. |
| Volume |
185-189 | Issue | Pages | 1371-1372 | |
| Keywords | YBCO HTS detectors | ||||
| Abstract | The ultrafast voltage response of YBaCuO films to laser radiation is studied and compared with previously investigated quasiparicles response to radiation of submillimeter wavelength range. Voltage shift under the visible light radiation has two components. Picosecond response realized as suppression superconductivity by nonequilibrium excess quasiparticles, response time is determined by quasiparticles recombination rate. Nanosecond response is probably due to bolometric effect. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4534 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1676 | |||
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| Author | Semenov, A.; Richter, H.; Hübers, H.-W.; Smirnov, K.; Voronov, B.; Gol'tsman, G. | ||||
| Title | Development of terahertz superconducting hot-electron bolometer mixers | Type | Conference Article | ||
| Year | 2003 | Publication | Proc. 6th European Conf. Appl. Supercond. | Abbreviated Journal | Proc. 6th European Conf. Appl. Supercond. |
| Volume |
181 | Issue | Pages | 2960-2965 | |
| Keywords | NbN HEB mixers | ||||
| Abstract | We present recent results of the development of phonon cooled hot-electron bolometric (HEB) mixers for airborne and balloon borne terahertz heterodyne receivers. Three iomportant issues have been addresses: the quality of NbN films the HEB mixers were made from, the spectral properties of the HEB mixers and the local oscillator power required for optical operation. Studies with an atomic force microscope indicate, that the performance of the HEB mixer might have been effected by the microstructure of the NbN film. Antenna gain and noise temperature were investigated at terahertz frequencies for a HEB embedded in either log-spiral or twin-slot feed antenna. Comparison suggests that at frequencies above 3 THz the spiral feed provides better overall performance. At 1.6 THz, a power of 2.5 µW was required from the local oscillator for optimal operation of the HEB mixer. | ||||
| Address | Sorrento, Italy | ||||
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| ISSN | ISBN | 0750309814, 978-0750309813 | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1505 | |||
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| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Potapov, V. D.; Sergeev, A. V. | ||||
| Title | Restriction of microwave enhancement of superconductivity in impure superconductors due to electron-electron interaction | Type | Journal Article | ||
| Year | 1991 | Publication | Phys. B Condens. Mat. | Abbreviated Journal | Phys. B Condens. Mat. |
| Volume |
169 | Issue | 1-4 | Pages | 629-630 |
| Keywords | impure superconductors | ||||
| Abstract | Transition from microwave enhancement of supercurrent to superconductivity suppression is investigated in impure superconductors. It is demonstrated that frequency range of enhancement effect narrows with the decrease of electron mean free path, ℓ, and at ℓ⩽1nm electron heating is observed in the whole frequency range. Dependences of frequency boundaries on ℓ are explained by taking into account strong electron-electron interaction in impure metals. | ||||
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| ISSN | 0921-4526 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1682 | |||
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| Author | Yagoubov, P.; Kroug, M.; Merkel, H.; Kollberg, E.; Schubert, J.; Hubers, H. W.; Svechnikov, S.; Voronov, B.; Gol'tsman, G.; Wang, Z. | ||||
| Title | Hot electron bolometric mixers based on NbN films deposited on MgO substrates | Type | Conference Article | ||
| Year | 1999 | Publication | Inst. Phys. Conf. Ser. | Abbreviated Journal | Inst. Phys. Conf. Ser. |
| Volume |
167 | Issue | Pages | 687-690 | |
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| Publisher | Place of Publication | Barcelona, Spain | Editor | ||
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| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | 4th Europ. Conf. on Appl. Superconductivity, Inst. Phys. Conf. Ser. | ||
| Notes | Approved | no | |||
| Call Number | Serial | 297 | |||
| Permanent link to this record | |||||
| Author | Schubert, J.; Semenov, A.; Hübers, H.-W.; Gol'tsman, G.; Schwaab, G.; Voronov, B.; Gershenzon, E. | ||||
| Title | Broad-band terahertz NbN hot-electron bolometric mixer | Type | Conference Article | ||
| Year | 1999 | Publication | Inst. Phys. Conf. | Abbreviated Journal | Inst. Phys. Conf. |
| Volume |
167 | Issue | Pages | 663-666 | |
| Keywords | NbN HEB mixers | ||||
| Abstract | |||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | 4th Europ. Conf. on Appl. Superconductivity, Barcelona, Spain, 14-17 September 1999 | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1578 | |||
| Permanent link to this record | |||||
| Author | Varyukhin, S. V.; Zakharov, A. A.; Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsyna, N. G.; Chulkova, G. M. | ||||
| Title | AC losses and submillimeter absorption in single crystals La2CuO4 | Type | Journal Article | ||
| Year | 1990 | Publication | Phys. B Condens. Mat. | Abbreviated Journal | Phys. B Condens. Mat. |
| Volume |
165-166 | Issue | Pages | 1269-1270 | |
| Keywords | metal-dielectric-La2Cu04 | ||||
| Abstract | The La2CuO4 single crystals were used to carry out the measurements of transmission spectra within the submillimeter range of wavelengths, as well as the capacitance C and conductivity G in the region of acoustic frequencies of the metal-dielectric-La2Cu04 system at low temperatures. The optical spectra display a threshold character. There takes place a sharp decreasing of transmission signal in the energy range of hυ>1.5meV. The C(ω,T) and G(ω,T) dependences have a universal form characteristic of relaxation processes of the Debye type. The relaxation time dependence displays a thermoactivation character τ(T)-exp(ξ/T) with a gap value of ξ≃2meV,coinciding with the optical one. It is assumed that there exist excitations with a characteristic energy ~ 2meV in La2Cu04.A possible nature of the revealed low-energy excitations is discussed. | ||||
| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4526 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1686 | |||
| Permanent link to this record | |||||
| Author | Ferrari, S.; Kovalyuk, V.; Vetter, A.; Lee, C.; Rockstuhl, C.; Semenov, A.; Gol'tsman, G.; Pernice, W. | ||||
| Title | Analysis of the detection response of waveguide-integrated superconducting nanowire single-photon detectors at high count rate | Type | Journal Article | ||
| Year | 2019 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
115 | Issue | 10 | Pages | 101104 |
| Keywords | SSPD, SNSPD, waveguide | ||||
| Abstract | Nanophotonic circuitry and superconducting nanowires have been successfully combined for detecting single photons, propagating in an integrated photonic circuit, with high efficiency and low noise and timing uncertainty. Waveguide-integrated superconducting nanowire single-photon detectors (SNSPDs) can nowadays be engineered to achieve subnanosecond recovery times and can potentially be adopted for applications requiring Gcps count rates. However, particular attention shall be paid to such an extreme count rate regime since artifacts in the detector functionality emerge. In particular, a count-rate dependent detection efficiency has been encountered that can compromise the accuracy of quantum detector tomography experiments. Here, we investigate the response of waveguide-integrated SNSPDs at high photon flux and identify the presence of parasitic currents due to the accumulation of charge in the readout electronics to cause the above-mentioned artifact in the detection efficiency. Our approach allows us to determine the maximum photon count rate at which the detector can be operated without adverse effects. Our findings are particularly important to avoid artifacts when applying SNSPDs for quantum tomography. We acknowledge support through ERC Consolidator Grant No. 724707 and from the Deutsche Forschungsgemeinschaft through Project No. PE 1832/5-1,2, as well as funding by the Volkswagen Foundation. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 675745. V.K. and G.G. acknowledge support from the Russian Science Foundation Project No. 16-12-00045 (NbN film deposition and testing). A.V. acknowledges support from the Karlsruhe School of Optics and Photonics (KSOP). |
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| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0003-6951 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1185 | |||
| Permanent link to this record | |||||
| Author | Jukna, A.; Kitaygorsky, J.; Pan, D.; Cross, A.; Perlman, A.; Komissarov, I.; Sobolewski, R.; Okunev, O.; Smirnov, K.; Korneev, A.; Chulkova, G.; Milostnaya, I.; Voronov, B.; Gol'tsman, G. | ||||
| Title | Dynamics of hotspot formation in nanostructured superconducting stripes excited with single photons | Type | Journal Article | ||
| Year | 2008 | Publication | Acta Physica Polonica A | Abbreviated Journal | Acta Physica Polonica A |
| Volume |
113 | Issue | 3 | Pages | 955-958 |
| Keywords | SSPD, SNSPD | ||||
| Abstract | Dynamics of a resistive hotspot formation by near-infrared-wavelength single photons in nanowire-type superconducting NbN stripes was investigated. Numerical simulations of ultrafast thermalization of photon-excited nonequilibrium quasiparticles, their multiplication and out-diffusion from a site of the photon absorption demonstrate that 1.55 μm wavelength photons create in an ultrathin, two-dimensional superconducting film a resistive hotspot with the diameter which depends on the photon energy, and the nanowire temperature and biasing conditions. Our hotspot model indicates that under the subcritical current bias of the 2D stripe, the electric field penetrates the superconductor at the hotspot boundary, leading to suppression of the stripe superconducting properties and accelerated development of a voltage transient across the stripe. | ||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1414 | |||
| Permanent link to this record | |||||
| Author | Beck, M.; Rousseau, I.; Klammer, M.; Leiderer, P.; Mittendorff, M.; Winnerl, S.; Helm, M.; Gol'tsman, G.N.; Demsar, J. | ||||
| Title | Transient increase of the energy gap of superconducting NbN thin films excited by resonant narrow-band terahertz pulses | Type | Journal Article | ||
| Year | 2013 | Publication | Phys. Rev. Lett. | Abbreviated Journal | Phys. Rev. Lett. |
| Volume |
110 | Issue | 26 | Pages | 267003 (1 to 5) |
| Keywords | NbN thin films, energy gap | ||||
| Abstract | Observations of radiation-enhanced superconductivity have thus far been limited to a few type-I superconductors (Al, Sn) excited at frequencies between the inelastic scattering rate and the superconducting gap frequency 2Delta/h. Utilizing intense, narrow-band, picosecond, terahertz pulses, tuned to just below and above 2Delta/h of a BCS superconductor NbN, we demonstrate that the superconducting gap can be transiently increased also in a type-II dirty-limit superconductor. The effect is particularly pronounced at higher temperatures and is attributed to radiation induced nonthermal electron distribution persisting on a 100 ps time scale. | ||||
| Address | Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457, Germany | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0031-9007 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:23848912 | Approved | no | ||
| Call Number | Serial | 1370 | |||
| Permanent link to this record | |||||
| Author | Beck, M.; Klammer, M.; Lang, S.; Leiderer, P.; Kabanov, V. V.; Gol'tsman, G. N.; Demsar, J. | ||||
| Title | Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy | Type | Journal Article | ||
| Year | 2011 | Publication | Phys. Rev. Lett. | Abbreviated Journal | Phys. Rev. Lett. |
| Volume |
107 | Issue | 17 | Pages | 4 |
| Keywords | NbN thin film, energy gap dynamics | ||||
| Abstract | Using time-domain terahertz spectroscopy we performed direct studies of the photoinduced suppression and recovery of the superconducting gap in a conventional BCS superconductor NbN. Both processes are found to be strongly temperature and excitation density dependent. The analysis of the data with the established phenomenological Rothwarf-Taylor model enabled us to determine the bare quasiparticle recombination rate, the Cooper pair-breaking rate and the electron-phonon coupling constant, λ=1.1±0.1, which is in excellent agreement with theoretical estimates. | ||||
| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ gujma @ | Serial | 641 | ||
| Permanent link to this record | |||||
| Author | Cherednichenko, S.; Drakinskiy, V.; Baubert, J.; Krieg, J.-M.; Voronov, B.; Gol'tsman, G.; Desmaris, V. | ||||
| Title | Gain bandwidth of NbN hot-electron bolometer terahertz mixers on 1.5 μm Si3N4 / SiO2 membranes | Type | Journal Article | ||
| Year | 2007 | Publication | J. Appl. Phys. | Abbreviated Journal | J. Appl. Phys. |
| Volume |
101 | Issue | 12 | Pages | 124508 (1 to 6) |
| Keywords | HEB, mixer, membrane | ||||
| Abstract | The gain bandwidth of NbN hot-electron bolometer terahertz mixers on electrically thin Si3N4/SiO2 membranes was experimentally investigated and compared with that of HEB mixers on bulk substrates. A gain bandwidth of 3.5 GHz is achieved on bulk silicon, whereas the gain bandwidth is reduced down to 0.6–0.9 GHz for mixers on 1.5 μm Si3N4/SiO2 membranes. We show that application of a MgO buffer layer on the membrane extends the gain bandwidth to 3 GHz. The experimental data were analyzed using the film-substrate acoustic mismatch approach. | ||||
| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0021-8979 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 560 | |||
| Permanent link to this record | |||||
| Author | Korneev, A.; Divochiy, A.; Tarkhov, M.; Minaeva, O.; Seleznev, V.; Kaurova, N.; Voronov, B.; Okunev, O.; Chulkova, G.; Milostnaya, I.; Smirnov, K.; Gol'tsman, G. | ||||
| Title | New advanced generation of superconducting NbN-nanowire single-photon detectors capable of photon number resolving | Type | Conference Article | ||
| Year | 2008 | Publication | J. Phys.: Conf. Ser. | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume |
97 | Issue | Pages | 012307 (1 to 6) | |
| Keywords | PNR SSPD; SNSPD | ||||
| Abstract | We present our latest generation of ultrafast superconducting NbN single-photon detectors (SSPD) capable of photon-number resolving (PNR). We have developed, fabricated and tested a multi-sectional design of NbN nanowire structures. The novel SSPD structures consist of several meander sections connected in parallel, each having a resistor connected in series. The novel SSPDs combine 10 μm × 10 μm active areas with a low kinetic inductance and PNR capability. That resulted in a significantly reduced photoresponse pulse duration, allowing for GHz counting rates. The detector's response magnitude is directly proportional to the number of incident photons, which makes this feature easy to use. We present experimental data on the performances of the PNR SSPDs. The PNR SSPDs are perfectly suited for fibreless free-space telecommunications, as well as for ultrafast quantum cryptography and quantum computing. | ||||
| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1742-6596 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1245 | |||
| Permanent link to this record | |||||
| Author | Casaburi, A.; Ejrnaes, M.; Quaranta, O.; Gaggero, A.; Mattioli, F.; Leoni, R.; Voronov, B.; Gol'tsman, G.; Lisitskiy, M.; Esposito, E.; Nappi, C.; Cristiano, R.; Pagano, S. | ||||
| Title | Experimental characterization of NbN nanowire optical detectors with parallel stripline configuration | Type | Conference Article | ||
| Year | 2008 | Publication | J. Phys.: Conf. Ser. | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume |
97 | Issue | Pages | 012265 (1 to 6) | |
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | We have developed a novel geometrical configuration for NbN-based superconducting single photon optical detector (SSPD) that achieves two goals: a much lower intrinsic impedance, and a consequently greater bandwidth, and a much larger signal amplitude compared to the standard meandered configuration. This has been obtained by implementing a properly designed parallel stripline structure where a cascade switching mechanism occurs when one of the striplines is hit by an optical photon. The overall switching occurs synchronously and in a very short time, giving rise to a strong and fast voltage pulse. The SSPD have been realized using state of the art NbN deposition technology and e-beam lithography. The strips are 100 nm wide and 5 μm long and have been realized with 4 nm NbN film on sapphire and Si substrate. We report on experimental characterization of such novel devices. The performances of the proposed novel type of SSPD are compared with standard SSPD design and results in terms of signal amplitude, risetime and effective detection area. | ||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | IOP Publishing | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1742-6596 | ISBN | Medium | ||
| Area | Expedition | Conference | 8th European Conference on Applied Superconductivity (EUCAS 2007) | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1416 | |||
| Permanent link to this record | |||||
| Author | Peltonen, J. T.; Peng, Z. H.; Korneeva, Yu. P.; Voronov, B. M.; Korneev, A. A.; Semenov, A. V.; Gol'tsman, G. N.; Tsai, J. S; Astafiev, Oleg | ||||
| Title | Coherent dynamics and decoherence in a superconducting weak link | Type | Journal Article | ||
| Year | 2016 | Publication | Physic. Rev. B, | Abbreviated Journal | Physic. Rev. B, |
| Volume |
94 | Issue | Pages | 180508 | |
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| Language | Summary Language | Original Title | |||
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| Series Volume | Series Issue | Edition | |||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ akorneev @ | Serial | 1123 | ||
| Permanent link to this record | |||||
| Author | Tarkhov, M.; Claudon, J.; Poizat, J. Ph.; Korneev, A.; Divochiy, A.; Minaeva, O.; Seleznev, V.; Kaurova, N.; Voronov, B.; Semenov, A. V.; Gol'tsman, G. | ||||
| Title | Ultrafast reset time of superconducting single photon detectors | Type | Journal Article | ||
| Year | 2008 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
92 | Issue | 24 | Pages | 241112 (1 to 3) |
| Keywords | SSPD, SNSPD | ||||
| Abstract | |||||
| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0003-6951 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 429 | |||
| Permanent link to this record | |||||
| Author | Delacour, C.; Claudon, J.; Poizat, J.-Ph.; Pannetier, B.; Bouchiat, V.; de Lamaestre, R. Espiau; Villegier, J.-C.; Tarkhov, M.; Korneev, A.; Voronov, B.; Gol'tsman, G. | ||||
| Title | Superconducting single photon detectors made by local oxidation with an atomic force microscope | Type | Journal Article | ||
| Year | 2007 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
90 | Issue | 19 | Pages | 191116 (1 t0 3) |
| Keywords | SSPD | ||||
| Abstract | The authors present a fabrication technique of superconducting single photon detectors made by local oxidation of niobium nitride ultrathin films. Narrow superconducting meander lines are obtained by direct writing of insulating niobium oxynitride lines through the films using voltage-biased tip of an atomic force microscope. Due to the 30nm resolution of the lithographic technique, the filling factor of the meander line can be made substantially higher than detector of similar geometry made by electron beam lithography, thus leading to increased quantum efficiency. Single photon detection regime of these devices is demonstrated at 4.2K. The authors thank J.-P. Maneval for stimulating discussions. This work has been partly supported by ACI Nanoscience from French Ministry of Research, D.G.A., by Grant No. 02.445.11.7434 of Russian Ministry of Education and Science, and by the European Commission under project “SINPHONIA,” Contract No. NMP4-CT-2005-16433. |
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| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0003-6951 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 423 | |||
| Permanent link to this record | |||||
| Author | Lusche, R.; Semenov, A.; Korneeva, Y.; Trifonov, A.; Korneev, A.; Gol'tsman, G.; Hübers, H.-W. | ||||
| Title | Effect of magnetic field on the photon detection in thin superconducting meander structures | Type | Journal Article | ||
| Year | 2014 | Publication | Phys. Rev. B | Abbreviated Journal | Phys. Rev. B |
| Volume |
89 | Issue | 10 | Pages | 104513 (1 to 7) |
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | We have studied the influence of an externally applied magnetic field on the photon and dark count rates of meander-type niobium nitride superconducting nanowire single-photon detectors. Measurements have been performed at a temperature of 4.2 K, and magnetic fields up to 250 mT have been applied perpendicularly to the meander plane. While photon count rates are field independent at weak applied fields, they show a strong dependence at fields starting from approximately ±25 mT. This behavior, as well as the magnetic field dependence of the dark count rates, is in good agreement with the recent theoretical model of vortex-assisted photon detection and spontaneous vortex crossing in narrow superconducting lines. However, the local reduction of the superconducting free energy due to photon absorption, which is the fitting parameter in the model, increases much slower with the photon energy than the model predicts. Furthermore, changes in the free-energy during photon counts and dark counts depend differently on the current that flows through the meander. This indicates that photon counts and dark counts occur in different parts of the meander. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1098-0121 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1367 | |||
| Permanent link to this record | |||||
| Author | Semenov, A. D.; Hübers, H.-W.; Schubert, J.; Gol'tsman, G. N.; Elantiev, A. I.; Voronov, B. M.; Gershenzon, E. M. | ||||
| Title | Design and performance of the lattice-cooled hot-electron terahertz mixer | Type | Journal Article | ||
| Year | 2000 | Publication | J. Appl. Phys. | Abbreviated Journal | J. Appl. Phys. |
| Volume |
88 | Issue | 11 | Pages | 6758-6767 |
| Keywords | HEB mixer, charge imbalance, HF current distribution | ||||
| Abstract | We present the measurements and the theoreticalmodel of the frequency-dependent noise temperature of a superconductor lattice-cooled hot-electron bolometer mixer in the terahertz frequency range. The increase of the noise temperature with frequency is a cumulative effect of the nonuniform distribution of the high-frequency current in the bolometer and the charge imbalance, which occurs at the edges of the normal domain and at the contacts with normal metal. We show that under optimal operation the fluctuation sensitivity of the mixer is determined by thermodynamic fluctuations of the noise power, whereas at small biases there appears additional noise, which is probably due to the flux flow. We propose the prescription of how to minimize the influence of the current distribution on the mixer performance. | ||||
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| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0021-8979 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 306 | |||
| Permanent link to this record | |||||
| Author | Baselmans, J. J. A.; Baryshev, A.; Reker, S. F.; Hajenius, M.; Gao, J. R.; Klapwijk, T. M.; Vahtomin, Yu.; Maslennikov, S.; Antipov, S.; Voronov, B.; Gol'tsman, G. | ||||
| Title | Direct detection effect in small volume hot electron bolometer mixers | Type | Journal Article | ||
| Year | 2005 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
86 | Issue | 16 | Pages | 163503 (1 to 3) |
| Keywords | HEB, mixer, direct detection effect | ||||
| Abstract | We measure the direct detection effect in a small volume (0.15μm×1μm×3.5nm)(0.15μm×1μm×3.5nm) quasioptical NbN phonon cooled hot electronbolometermixer at 1.6THz1.6THz. We find that the small signal sensitivity of the receiver is underestimated by 35% due to the direct detection effect and that the optimal operating point is shifted to higher bias voltages when using calibration loads of 300K300K and 77K77K. Using a 200GHz200GHzbandpass filter at 4.2K4.2K the direct detection effect virtually disappears. This has important implications for the calibration procedure of these receivers in real telescope systems. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 377 | |||
| Permanent link to this record | |||||
| Author | Baselmans, J. J. A.; Hajenius, M.; Gao, J. R.; Klapwijk, T. M.; de Korte, P. A. J.; Voronov, B.; Gol'tsman, G. | ||||
| Title | Doubling of sensitivity and bandwidth in phonon cooled hot electron bolometer mixers | Type | Journal Article | ||
| Year | 2004 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
84 | Issue | 11 | Pages | 1958-1960 |
| Keywords | NbN HEB mixers | ||||
| Abstract | We demonstrate that the performance of NbN lattice cooled hot electron bolometer mixers depends strongly on the interface quality between the bolometer and the contact structure. We show experimentally that both the receiver noise temperature and the gain bandwidth can be improved by more than a factor of 2 by cleaning the interface and adding an additional superconducting interlayer to the contact pad. Using this we obtain a double sideband receiver noise temperature TN,DSB=950 K at 2.5 THz and 4.3 K, uncorrected for losses in the optics. At the same bias point, we obtain an IF gain bandwidth of 6 GHz. |
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 352 | |||
| Permanent link to this record | |||||
| Author | Korneev, A.; Kouminov, P.; Matvienko, V.; Chulkova, G.; Smirnov, K.; Voronov, B.; Gol'tsman, G. N.; Currie, M.; Lo, W.; Wilsher, K.; Zhang, J.; Słysz, W.; Pearlman, A.; Verevkin, A.; Sobolewski, Roman | ||||
| Title | Sensitivity and gigahertz counting performance of NbN superconducting single-photon detectors | Type | Journal Article | ||
| Year | 2004 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
84 | Issue | 26 | Pages | 5338-5340 |
| Keywords | SSPD, NEP, QE | ||||
| Abstract | We have measured the quantum efficiencysQEd, GHz counting rate, jitter, and noise-equivalentpowersNEPdof nanostructured NbN superconducting single-photon detectorssSSPDsdin thevisible to infrared radiation range. Our 3.5-nm-thick and 100- to 200-nm-wide meander-typedevices(total area 10310mm2), operating at 4.2 K, exhibit an experimental QE of up to 20% inthe visible range and,10% at 1.3 to 1.55mm wavelength and are potentially sensitive up tomidinfrareds,10mmdradiation. The SSPD counting rate was measured to be above 2 GHz withjitter,18 ps, independent of the wavelength. The devices’ NEP varies from,10−17W/Hz1/2for1.55mm photons to,10−20W/Hz1/2for visible radiation. Lowering the SSPD operatingtemperature to 2.3 K significantly enhanced its performance, by increasing the QE to,20% andlowering the NEP level to,3310−22W/Hz1/2, both measured at 1.26mm wavelength. | ||||
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| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0003-6951 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 532 | |||
| Permanent link to this record | |||||
| Author | Verevkin, A.; Zhang, J.; Sobolewski, Roman; Lipatov, A.; Okunev, O.; Chulkova, G.; Korneev, A.; Smirnov, K.; Gol'tsman, G. N.; Semenov, A. | ||||
| Title | Detection efficiency of large-active-area NbN single-photon superconducting detectors in the ultraviolet to near-infrared range | Type | Journal Article | ||
| Year | 2002 | Publication | Appl. Phys. Lett. | Abbreviated Journal | |
| Volume |
80 | Issue | 25 | Pages | 4687-4689 |
| Keywords | NbN SSPD, SNSPD, QE | ||||
| Abstract | We report our studies on spectral sensitivity of meander-type, superconducting NbN thin-film single-photon detectors (SPDs), characterized by GHz counting rates of visible and near-infrared photons and negligible dark counts. Our SPDs exhibit experimentally determined quantum efficiencies ranging from ∼0.2% at the 1.55 μm wavelength to ∼70% at 0.4 μm. Spectral dependences of the detection efficiency (DE) at the 0.4 to 3.0-μm-wavelength range are presented. The exponential character of the DE dependence on wavelength, as well as its dependence versus bias current, is qualitatively explained in terms of superconducting fluctuations in our ultrathin, submicron-width superconducting stripes. The DE values of large-active-area NbN SPDs in the visible range are high enough for modern quantum communications. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 331 | |||
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| Author | Bespalov, A.V.; Gol'tsman, G.N.; Semenov, A.D.; Renk, K.F. | ||||
| Title | Determination of the far-infrared emission characteristic of a cyclotron p-germanium laser by use of a superconducting Nb detector | Type | Journal Article | ||
| Year | 1991 | Publication | Solid State Communications | Abbreviated Journal | Solid State Communications |
| Volume |
80 | Issue | 7 | Pages | 503-506 |
| Keywords | Nb detector, applications | ||||
| Abstract | We studied the far-infrared emission characteristics of a cyclotron p-germanium laser using a broad-band superconducting Nb film detector. For magnetic fields between ∼25 kOe and ∼50 kOe, emission in a frequency range from ∼50 cm-1 to ∼100 cm-1 with maximum intensity around 90 cm-1 was obtained. We determined, for fixed magnetic fields, electric field dependences of the emission intensity taking into account that the total electric field is a sum of the applied and the Hall electric field. An analysis of the emission intensity characteristic gives evidence that transitions between the two lowest Landau levels of light holes are responsible for the laser action. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1677 | |||
| Permanent link to this record | |||||
| Author | Il'in, K. S.; Lindgren, M.; Currie, M. A.; Semenov, D.; Gol'tsman, G. N.; Sobolewski, Roman; Cherednichenko, S. I.; Gershenzon, E. M. | ||||
| Title | Picosecond hot-electron energy relaxation in NbN superconducting photodetectors | Type | Journal Article | ||
| Year | 2000 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
76 | Issue | 19 | Pages | 2752-2754 |
| Keywords | NbN HEB detectors, two-temperature model, IF bandwidth | ||||
| Abstract | We report time-resolved characterization of superconducting NbN hot-electron photodetectors using an electro-optic sampling method. Our samples were patterned into micron-size microbridges from 3.5-nm-thick NbN films deposited on sapphire substrates. The devices were illuminated with 100 fs optical pulses, and the photoresponse was measured in the ambient temperature range between 2.15 and 10.6 K (superconducting temperature transition TC). The experimental data agreed very well with the nonequilibrium hot-electron, two-temperature model. The quasiparticle thermalization time was ambient temperature independent and was measured to be 6.5 ps. The inelastic electron–phonon scattering time Ï„e–ph tended to decrease with the temperature increase, although its change remained within the experimental error, while the phonon escape time Ï„es decreased almost by a factor of two when the sample was put in direct contact with superfluid helium. Specifically, Ï„e–ph and Ï„es, fitted by the two-temperature model, were equal to 11.6 and 21 ps at 2.15 K, and 10(±2) and 38 ps at 10.5 K, respectively. The obtained value of Ï„e–ph shows that the maximum intermediate frequency bandwidth of NbN hot-electron phonon-cooled mixers operating at TC can reach 16(+4/–3) GHz if one eliminates the bolometric phonon-heating effect. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0003-6951 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 856 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. | ||||
| Title | Mechanism of picosecond response of granular YBaCuO films to electromagnetic radiation | Type | Journal Article | ||
| Year | 1990 | Publication | Solid State Communications | Abbreviated Journal | Solid State Communications |
| Volume |
76 | Issue | 4 | Pages | 493-497 |
| Keywords | YBCO HTS detectors | ||||
| Abstract | The ultrafast mechanisms of radiation detection in granular YBaCuO films are studied in the wide wavelength range from millimeter to near infrared. With the rise of radiation frequency the Josephson detection at the grain boundary weak links is replaced by electron heating into the grains. This change occurs in the submillimeter wavelength range. Electron-phonon relaxation time τeph is determined by direct measurements and analyses quasistationary electron heating. Temperature dependence of τeph at T ≤ 40 K was found to be τeph ∼ T−1. The results show that detectors with the response time of few picoseconds at nitrogen temperature are attainable. | ||||
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| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1685 | |||
| Permanent link to this record | |||||
| Author | Gousev, Yu. P.; Gol'tsman, G. N.; Semenov, A. D.; Gershenzon, E. M.; Nebosis, R. S.; Heusinger, M. A.; Renk, K. F. | ||||
| Title | Broadband ultrafast superconducting NbN detector for electromagnetic radiation | Type | Journal Article | ||
| Year | 1994 | Publication | J. Appl. Phys. | Abbreviated Journal | J. Appl. Phys. |
| Volume |
75 | Issue | 7 | Pages | 3695-3697 |
| Keywords | NbN HEB | ||||
| Abstract | An ultrafast detector that is sensitive to radiation in a broad spectral range from submillimeter waves to visible light is reported. It consists of a structured NbN thin film cooled to a temperature below Tc (∼11 K). Using 20 ps pulses of a GaAs laser, we observed signal pulses with both rise and decay time of about 50 ps. From the analysis of a mixing experiment with submillimeter radiation we estimate an intrinsic response time of the detector of ∼12 ps. The sensitivity was found to be similar for the near‐infrared and submillimeter radiation. Broadband sensitivity and short response time are attributed to a quasiparticle heating effect. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 252 | |||
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| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Potapov, V. D.; Sergeev, A. V. | ||||
| Title | Restriction of microwave enhancement of superconductivity in impure superconductors due to electron-electron interaction | Type | Journal Article | ||
| Year | 1990 | Publication | Solid State Communications | Abbreviated Journal | Solid State Communications |
| Volume |
75 | Issue | 8 | Pages | 639-641 |
| Keywords | impure superconductors | ||||
| Abstract | Transition from microwave enhancement of supercurrent to superconductivity suppression is investigated in impure superconductors. It is demonstrated that the frequency range of the enhancement effect narrows with the decrease of the electron mean free path, l, and at l ⩽ 1 nm electron heating is observed in the whole frequency range. Dependences of frequency boundaries on l are explained by taking into account strong electron-electron interaction in impure metals. | ||||
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| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1687 | |||
| Permanent link to this record | |||||
| Author | Yagoubov, P.; Kroug, M.; Merkel, H.; Kollberg, E.; Gol'tsman, G.; Svechnikov, S.; Gershenzon, E. | ||||
| Title | Noise temperature and local oscillator power requirement of NbN phonon-cooled hot electron bolometric mixers at terahertz frequencies | Type | Journal Article | ||
| Year | 1998 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
73 | Issue | 19 | Pages | 2814-2816 |
| Keywords | NbN HEB mixers, noise temperature, local oscillator power | ||||
| Abstract | In this letter, the noise performance of NbN-based phonon-cooled hot electron bolometric quasioptical mixers is investigated in the 0.55–1.1 THz frequency range. The best results of the double-sideband <cd><2018>DSB<cd><2019> noise temperature are: 500 K at 640 GHz, 600 K at 750 GHz, 850 K at 910 GHz, and 1250 K at 1.1 THz. The water vapor in the signal path causes significant contribution to the measured receiver noise temperature around 1.1 THz. The devices are made from 3-nm-thick NbN film on high-resistivity Si and integrated with a planar spiral antenna on the same substrate. The in-plane dimensions of the bolometer strip are typically 0.2Ï«2 um. The amount of local oscillator power absorbed in the bolometer is less than 100 nW. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 911 | |||
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| Author | Ekstörm, H.; Kollberg, E.; Yagoubov, P.; Gol'tsman, G.; Gershenzon, E.; Yngvesson, S. | ||||
| Title | Gain and noise bandwidth of NbN hot-electron bolometric mixers | Type | Journal Article | ||
| Year | 1997 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
70 | Issue | 24 | Pages | 3296-3298 |
| Keywords | NbN HEB mixers, conversion loss, conversion gain, U-factor technique | ||||
| Abstract | We have measured the noise performance and gain bandwidth of 35 Å thin NbN hot-electron mixers integrated with spiral antennas on silicon substrate lenses at 620 GHz. The best double-sideband receiver noise temperature is less than 1300 K with a 3 dB bandwidth of ≈5 GHz. The gain bandwidth is 3.2 GHz. The mixer output noise dominated by thermal fluctuations is 50 K, and the intrinsic conversion gain is about −12 dB. Without mismatch losses and excluding the loss from the beamsplitter, we expect to achieve a receiver noise temperature of less than 700 K. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 279 | |||
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| Author | Lindgren, M.; Zorin, M. A.; Trifonov, V.; Danerud, M.; Winkler, D.; Karasik, B. S.; Gol'tsman, G. N.; Gershenzon, E. M. | ||||
| Title | Optical mixing in a patterned YBa2Cu3O7-δ thin film | Type | Journal Article | ||
| Year | 1994 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume |
65 | Issue | 26 | Pages | 3398-3400 |
| Keywords | YBCO HTS HEB mixer, bandwidth | ||||
| Abstract | Mixing of 1.56 µm infrared radiation from two lasers in a high quality YBa2Cu3O7-δ thin film, patterned to parallel strips, was demonstrated. A mixer bandwidth of 18 GHz, limited by the measurement system, was obtained. A model based on nonequilibrium electron heating gives a good fit to the data and predicts an intrinsic mixer bandwidth in excess of 100 GHz, operating in the whole infrared spectrum. Reduction of bolometric effects and ways to decrease the conversion loss of the mixer is discussed. The minimum conversion loss is expected to be ~10 dB. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0003-6951 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 251 | |||
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| Author | Gol'tsman, G. N.; Gusinskii, E. N.; Malyavkin, A. V.; Ptitsina, N. G.; Selevko, A. G.; Edel'shtein, V. M. | ||||
| Title | The excitonic Zeeman effect in uniaxially-strained germanium | Type | Journal Article | ||
| Year | 1987 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
65 | Issue | 6 | Pages | 1233-1241 |
| Keywords | Ge, Zeeman effect | ||||
| Abstract | We have carried out a high-resolution spectroscopic study of the absorption of submillimeter radiation by free excitons in germanium compressed along the [ 1 11 ] axis in a magnetic field parallel to the compression axis. In particular, we studied the splitting of the 1s- 2p transition in fields up to 6 kOe at T = 1.6 K, and observed a complex pattern in the Zeeman splitting which we believe is related to the effect of thermal motion of the excitons in a magnetic field on their internal structure (the magneto-Stark effect). The calculated submillimeter spectrum of excitons agrees with the experimental data. We predict that in a magnetic field the energy of the 2p, term is a minimum at a finite value of the exciton momentum perpendicular to the field-that is, the energy minimum forms a ring in momentum space. It follows that the density of states for this term must be a nonmonotonic function of the energy. A theory is developed of analogous phenomena in positronium. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1705 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G.; Riger, E. R. | ||||
| Title | Effect of electron-electron collisions on the trapping of free carriers by shallow impurity centers in germanium | Type | Journal Article | ||
| Year | 1986 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
64 | Issue | 4 | Pages | 889-897 |
| Keywords | Ge, trapping of free carriers | ||||
| Abstract | Cascade Auger recombination of free carriers on shallow impurities in Ge is investigated under quasi-equilibrium conditions (T= 2-12 K) and in impurity breakdown. The Auger capture cross sections are found to be a,= 5. 10-l9 T-'n cm2 for donors and uip= 7- T-5p cm2 for acceptors. It is shown that in an isotropic semiconductor (p-Ge) ui is well described by the cascade-capture theory that takes into account only electron-electron collisions. In an anisotropic semiconductor ui is considerably larger (n-Ge, strongly uniaxially compressedp-Ge). Under impurity breakdown conditions the electron-electron collisions determine the lifetimes of the free carriers only in samples with appreciable density of the compensating impurity (Nk loi3 cmP3). | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1707 | |||
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| Author | Smirnov, K.; Korneev, A.; Minaeva, O.; Divochiy, A.; Tarkhov, M.; Ryabchun, S.; Seleznev, V.; Kaurova, N.; Voronov, B.; Gol'tsman, G.; Polonsky, S. | ||||
| Title | Ultrathin NbN film superconducting single-photon detector array | Type | Conference Article | ||
| Year | 2007 | Publication | J. Phys.: Conf. Ser. | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume |
61 | Issue | Pages | 1081-1085 | |
| Keywords | SSPD array | ||||
| Abstract | We report on the fabrication process of the 2 × 2 superconducting single-photon detector (SSPD) array. The SSPD array is made from ultrathin NbN film and is operated at liquid helium temperatures. Each detector is a nanowire-based structure patterned by electron beam lithography process. The advances in fabrication technology allowed us to produce highly uniform strips and preserve superconducting properties of the unpatterned film. SSPD exhibit up to 30% quantum efficiency in near infrared and up to 1% at 5-μm wavelength. Due to 120 MHz counting rate and 18 ps jitter, the time-domain multiplexing read-out is proposed for large scale SSPD arrays. Single-pixel SSPD has already found a practical application in non-invasive testing of semiconductor very-large scale integrated circuits. The SSPD significantly outperformed traditional single-photon counting avalanche diodes. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1742-6588 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 408 | |||
| Permanent link to this record | |||||
| Author | Verevkin, A. I.; Ptitsina, N. G.; Chulkova, G. M.; Gol'tsman, G. N.; Gershenzon, E. M.; Yngvesson, K. S. | ||||
| Title | Electron energy relaxation in a 2D channel in AlGaAs-GaAs heterostructures under quasiequilibrium conditions at low temperatures | Type | Journal Article | ||
| Year | 1995 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
| Volume |
61 | Issue | 7 | Pages | 591-595 |
| Keywords | 2DEG, AlGaAs/GaAs heterostructures | ||||
| Abstract | The energy relaxation time of 2D electrons, Te, has been measured under quasiequilibrium conditions in AlGaAs—GaAs heterojunctions over the temperature range T= 1.5—20 K. At T> 4 K, Te depends only weakly on the temperature, while at T< 4 K 7;'(T) there is a dependence fr; lNT. A linear dependence 7: 1 (T) in the Bloch—-Grfineisen temperature region (T< 5 K) is unambiguous evidence that a piezoacoustic mechanism of an electron—phonon interaction is predominant in the inelastic scattering of electrons. The values of T6 in this temperature range agree very accurately with theoretical results reported by Karpus [Sov. Phys. Semicond. 22 (1988)]. At higher temperatures, where scat—tering by deformation acoustic phonons becomes substantial, there is a significant discrepancy between the experimental and theoretical re-sults. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1624 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gershenzon, M. E.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. | ||||
| Title | Heating of electrons in a superconductor in the resistive state by electromagnetic radiation | Type | Journal Article | ||
| Year | 1984 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
59 | Issue | 2 | Pages | 442-450 |
| Keywords | Nb HEB | ||||
| Abstract | The effect of heating of electrons relative to phonons is observed and investigated in a superconducting film that is made resistive by current and by an external magnetic field. The effect is manifested by an increase of the film resistance under the influence of the electromagnetic radiation, and is not selective in the frequency band 10^10-10^15 Hz. The independence of the effect of frequency under conditions of strong scattering by static defects is attributed to the decisive role of electron-electron collisions in the distribution function. The experimentally obtained characteristic time of resistance variation near the superconducting transition corresponds to the relaxation time of the order parameter, while at lower temperatures and fields it corresponds to the time of the inelastic electron-phonon interaction. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ phisix @ | Serial | 983 | ||
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| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Multanovskii, V. V.; Ptitsina, N. G. | ||||
| Title | Kinetics of electron and hole binding into excitons in germanium | Type | Journal Article | ||
| Year | 1983 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
57 | Issue | 2 | Pages | 369-376 |
| Keywords | Ge, electron and hole binding | ||||
| Abstract | The kinetics of binding of free carriers'into excitons under stationary and nonstationary conditions is studied by investigating the submillimeter photoconductivity of Ge in a wide range of temperatures and of excitation levels. It is shown that the absolute values and the temperature dependence of the binding cross section (o- T-'.' ) can be satisfactorily described by the cascade recombination theory. The value of o and its temperature dependence differ significantly from the cross sections, measured in the same manner, for capture by attracting small impurities. Under nonstationary conditions, just as in the case of recombination with shallow impurities, a signifi- cant role is played by the sticking of the carriers in highly excited states. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1711 | |||
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| Author | Smirnov, A. V.; Baryshev, A. M.; de Bernardis, P.; Vdovin, V. F.; Gol'tsman, G. N.; Kardashev, N. S.; Kuz'min, L. S.; Koshelets, V. P.; Vystavkin, A. N.; Lobanov, Yu. V.; Ryabchun, S. A.; Finkel, M. I.; Khokhlov, D. R. | ||||
| Title | The current stage of development of the receiving complex of the millimetron space observatory | Type | Journal Article | ||
| Year | 2012 | Publication | Radiophys. Quant. Electron. | Abbreviated Journal | Radiophys. Quant. Electron. |
| Volume |
54 | Issue | 8 | Pages | 557-568 |
| Keywords | Millimetron space observatory, HEB applications | ||||
| Abstract | We present an overview of the state of the onboard receiving complex of the Millimetron space observatory in the development phase of its preliminary design. The basic parameters of the onboard equipment planned to create and required for astrophysical observations are considered. A review of coherent and incoherent detectors, which are central to each receiver of the observatory, is given. Their characteristics and limiting parameters feasible at the present level of technology are reported. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 1079 | |||
| Permanent link to this record | |||||
| Author | Jiang, Ling; Miao, Wei; Zhang, Wen; Li, Ning; Lin, Zhen Hui; Yao, Qi Jun; Shi, Sheng-Cai; Svechnikov, S. I.; Vakhtomin, Y. B.; Antipov, S. V.; Voronov, B. M.; Kaurova, N. S.; Gol'tsman, G. N. | ||||
| Title | Characterization of a quasi-optical NbN superconducting HEB mixer | Type | Journal Article | ||
| Year | 2006 | Publication | IEEE Trans. Microwave Theory Techn. | Abbreviated Journal | IEEE Trans. Microwave Theory Techn. |
| Volume |
54 | Issue | 7 | Pages | 2944-2948 |
| Keywords | NbN HEB mixers | ||||
| Abstract | In this paper, the performance of a quasi-optical NbN superconducting hot-electron bolometer (HEB) mixer, cryogenically cooled by a close-cycled 4-K refrigerator, is thoroughly investigated at 300, 500, and 850 GHz. The lowest receiver noise temperatures measured at the respective three frequencies are 1400, 900, and 1350 K, which can go down to 659, 413, and 529 K, respectively, after correcting the loss and associated noise contribution of the quasi-optical system before the measured superconducting HEB mixer. The stability of the quasi-optical superconducting HEB mixer is also investigated here. The Allan variance time measured with a local oscillator pumping at 500 GHz and an IF bandwidth of 110 MHz is 1.5 s at the dc-bias voltage exhibiting the lowest noise temperature and increases to 2.5 s at a dc bias twice that voltage. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0018-9480 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1448 | |||
| Permanent link to this record | |||||
| Author | Verevkin, A. A.; Ptitsina, N. G.; Chulcova, G. M.; Gol'Tsman, G. N.; Gershenzon, E. M.; Yngvesson, K. S. | ||||
| Title | Determination of the limiting mobility of a two-dimensional electron gas in AlxGa1-xAs/GaAs heterostructures and direct measurement of the energy relaxation time | Type | Journal Article | ||
| Year | 1996 | Publication | Phys. Rev. B Condens. Matter. | Abbreviated Journal | Phys. Rev. B Condens. Matter. |
| Volume |
53 | Issue | 12 | Pages | R7592-R7595 |
| Keywords | 2DEG, AlGaAs/GaAs heterostructures | ||||
| Abstract | We present results for a method to measure directly the energy relaxation time (τe) for electrons in a single AlxGa1−xAs/GaAs heterojunction; measurements were performed from 1.6 to 15 K under quasiequilibrium conditions. We find τeαT−1 below 4 K, and τe independent of T above 4 K. We have also measured the energy-loss rate, ⟨Q⟩, by the Shubnikov-de Haas technique, and find ⟨Q⟩α(T3e−T3) for T<~4.2 K; Te is the electron temperature. The values and temperature dependence of τe and ⟨Q⟩ for T<4 K agree with calculations based on piezoelectric and deformation potential acoustic phonon scattering. At 4.2 K, we can also estimate the momentum relaxation time, τm, from our measured τe. This leads to a preliminary estimate of the phonon-limited mobility at 4.2 K of μ=3×107 cm2/Vs (ns=4.2×1011 cm−2), which agrees well with published numerical calculations, as well as with an earlier indirect estimate based on measurements on a sample with much higher mobility. | ||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0163-1829 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:9982274 | Approved | no | ||
| Call Number | Serial | 1612 | |||
| Permanent link to this record | |||||
| Author | Lang, P. T.; Leipold, I.; Knott, W. J.; Semenov, A. D.; Gol'tsman, G. N.; Renk, K. F. | ||||
| Title | New far-infrared laser lines from CH3Cl and CH3Br optically pumped with a continuously tunable high pressure CO2 laser | Type | Journal Article | ||
| Year | 1991 | Publication | Appl. Phys. B | Abbreviated Journal | Appl. Phys. B |
| Volume |
53 | Issue | 4 | Pages | 207-212 |
| Keywords | CO2 IR lasers, applications, CH3Cl, CH3Br | ||||
| Abstract | In this paper we report on the detection of new far-infrared laser lines from CH3Cl and CH3Br optically pumped with a continuously tunable high pressure CO2 laser. We found 80 new lines for CH3Cl and 9 new lines for CH3Br in the frequency region between 16 cm−1 and 41 cm−1, all due to stimulated Raman scattering. For the Raman gain regions bandwidths up to about 700 MHz were found. We also observed high intensity short far-infrared laser pulses of durations in the nanosecond regime. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0721-7269 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1678 | |||
| Permanent link to this record | |||||
| Author | Ryabchun, S. A.; Tretyakov, I. V.; Pentin, I. V.; Kaurova, N. S.; Seleznev, V. A.; Voronov, B. M.; Finkel, M. I.; Maslennikov, S. N.; Gol'tsman, G. N. | ||||
| Title | Low-noise wide-band hot-electron bolometer mixer based on an NbN film | Type | Journal Article | ||
| Year | 2009 | Publication | Radiophys. Quant. Electron. | Abbreviated Journal | |
| Volume |
52 | Issue | 8 | Pages | 576-582 |
| Keywords | HEB mixer, in-situ contacts, noise temperature, conversion gain bandwidth, diffusion cooling channel | ||||
| Abstract | We develop and study a hot-electron bolometer mixer made of a two-layer NbN–Au film in situ deposited on a silicon substrate. The double-sideband noise temperature of the mixer is 750 K at a frequency of 2.5 THz. The conversion efficiency measurements show that at the superconducting transition temperature, the intermediate-frequency bandwidth amounts to about 6.5 GHz for a mixer 0.112 μm long. These record-breaking characteristics are attributed to the improved contacts between a sensitive element and a helical antenna and are reached due to using the in situ deposition of NbN and Au layers at certain stages of the process. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 599 | |||
| Permanent link to this record | |||||
| Author | Kitaygorsky, Jennifer; Komissarov, I.; Jukna, A.; Minaeva, O.; Kaurova, N.; Divochiy, A.; Korneev, A.; Tarkhov, M.; Voronov, B.; Milostnaya, I.; Gol'tsman, G.; Sobolewski, R. | ||||
| Title | Fluctuations in two-dimensional superconducting NbN nanobridges and nanostructures meanders | Type | Abstract | ||
| Year | 2007 | Publication | Proc. APS March Meeting | Abbreviated Journal | Proc. APS March Meeting |
| Volume |
52 | Issue | 1 | Pages | L9.00013 |
| Keywords | |||||
| Abstract | We have observed fluctuations, manifested as sub-nanosecond to nanosecond transient, millivolt-amplitude voltage pulses, generated in two-dimensional NbN nanobridges, as well as in extended superconducting meander nanostructures, designed for single photon counting. Both nanobridges and nano-stripe meanders were biased at currents close to the critical current and measured in a range of temperatures from 1.5 to 8 K. During the tests, the devices were blocked from all incoming radiation by a metallic enclosure and shielded from any external magnetic fields. We attribute the observed spontaneous voltage pulses to the Kosterlitz-Thouless-type fluctuations, where the high enough applied bias current reduces the binding energy of vortex-antivortex pairs and, subsequently, thermal fluctuations break them apart causing the order parameter to momentarily reduce to zero, which in turn causes a transient voltage pulse. The duration of the voltage pulses depended on the device geometry (with the high-kinetic inductance meander structures having longer, nanosecond, pulses) while their rate was directly related to the biasing current as well as temperature. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1027 | |||
| Permanent link to this record | |||||
| Author | Meledin, D. V.; Marrone, D. P.; Tong, C.-Y. E.; Gibson, H.; Blundell, R.; Paine, S. N.; Papa, D.C.; Smith, M.; Hunter, T. R.; Battat, J.; Voronov, B.; Gol'tsman, G. | ||||
| Title | A 1-THz superconducting hot-electron-bolometer receiver for astronomical observations | Type | Journal Article | ||
| Year | 2004 | Publication | IEEE Trans. Microwave Theory Techn. | Abbreviated Journal | IEEE Trans. Microwave Theory Techn. |
| Volume |
52 | Issue | 10 | Pages | 2338-2343 |
| Keywords | NbN HEB mixer, applications | ||||
| Abstract | In this paper, we describe a superconducting hot-electron-bolometer mixer receiver developed to operate in atmospheric windows between 800-1300 GHz. The receiver uses a waveguide mixer element made of 3-4-nm-thick NbN film deposited over crystalline quartz. This mixer yields double-sideband receiver noise temperatures of 1000 K at around 1.0 THz, and 1600 K at 1.26 THz, at an IF of 3.0 GHz. The receiver was successfully tested in the laboratory using a gas cell as a spectral line test source. It is now in use on the Smithsonian Astrophysical Observatory terahertz test telescope in northern Chile. | ||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0018-9480 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1484 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N. | ||||
| Title | Effect of electromagnetic radiation on a superconductor in a magnetic field | Type | Conference Article | ||
| Year | 1988 | Publication | Izv. Akad. Nauk SSSR, Seriya Fizicheskaya | Abbreviated Journal | Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
| Volume |
52 | Issue | 3 | Pages | 449-451 |
| Keywords | |||||
| Abstract | The effect of electromagnetic radiation on thin superconducting films of Nb with a large number of static defects is investigated experimentally for the case where the film is in the resistive state due to an applied magnetic field and transport current. The results obtained are found to be well described by a model of spatially homogeneous electron heating. It is noted that the results obtained here for Nb films are also valid for Al, NbN, and MoRe films. | ||||
| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Russian | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0367-6765 | ISBN | Medium | ||
| Area | Expedition | Conference | 4th Vsesoiuznyi Seminar po Opticheskomu Detektirovaniiu Magnitnykh Rezonansov v Tverdykh Telakh, Tallin, Estonian SSR, Apr. 1987 | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1702 | |||
| Permanent link to this record | |||||
| Author | Verevkin, A.; Pearlman, A.; Slysz, W.; Zhang, J.; Currie, M.; Korneev, A.; Chulkova, G.; Okunev, O.; Kouminov, P.; Smirnov, K.; Voronov, B.; Gol'tsman, G. N.; Sobolewski, R. | ||||
| Title | Ultrafast superconducting single-photon detectors for near-infrared-wavelength quantum communications | Type | Journal Article | ||
| Year | 2004 | Publication | J. Modern Opt. | Abbreviated Journal | J. Modern Opt. |
| Volume |
51 | Issue | 9-10 | Pages | 1447-1458 |
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | The paper reports progress on the design and development of niobium-nitride, superconducting single-photon detectors (SSPDs) for ultrafast counting of near-infrared photons for secure quantum communications. The SSPDs operate in the quantum detection mode, based on photon-induced hotspot formation and subsequent appearance of a transient resistive barrier across an ultrathin and submicron-width superconducting stripe. The devices are fabricated from 3.5 nm thick NbN films and kept at cryogenic (liquid helium) temperatures inside a cryostat. The detector experimental quantum efficiency in the photon-counting mode reaches above 20% in the visible radiation range and up to 10% at the 1.3–1.55 μn infrared range. The dark counts are below 0.01 per second. The measured real-time counting rate is above 2 GHz and is limited by readout electronics (the intrinsic response time is below 30 ps). The SSPD jitter is below 18 ps, and the best-measured value of the noise-equivalent power (NEP) is 2 × 10−18 W/Hz1/2. at 1.3 μm. In terms of photon-counting efficiency and speed, these NbN SSPDs significantly outperform semiconductor avalanche photodiodes and photomultipliers. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0950-0340 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1488 | |||
| Permanent link to this record | |||||
| Author | Finkel, M. I.; Maslennikov, S. N.; Gol'tsman, G. N. | ||||
| Title | The concept of the receiving complex for the “Millimetron” space radio telescope | Type | Journal Article | ||
| Year | 2007 | Publication | Radiophys. Quant. Electron. | Abbreviated Journal | Radiophys. Quant. Electron. |
| Volume |
50 | Issue | 10-11 | Pages | 837-846 |
| Keywords | HEB, applications, Millimetron, VLBI | ||||
| Abstract | We consider the current status of research in the development of a submillimeter and far-infrared receiving instrument and propose promising solutions for the receivers of the spaceborne telescope “Millimetron,” which allow one to realize comprehensively the opportunities given by this international project administrated by the Astrospace Center of the P. N. Lebedev Physical Institute of the Russian Academy of Sciences. | ||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0033-8443 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 411 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gershenzon, M. E.; Gol'tsman, G. N.; Semyonov, A. D.; Sergeev, A. V. | ||||
| Title | Heating of electrons in superconductor in the resistive state due to electromagnetic radiation | Type | Journal Article | ||
| Year | 1984 | Publication | Solid State Communications | Abbreviated Journal | Solid State Communications |
| Volume |
50 | Issue | 3 | Pages | 207-212 |
| Keywords | Nb HEB | ||||
| Abstract | The effect of heating electrons with respect to phonons in a thin superconducting film driven into the resistive state by the current and the external magnetic field has been observed and investigated. This effect caused by the electromagnetic radiation is manifested in the increased resistance of the film and is not selective over the frequency range from 1010 to 1015 Hz. That the effect is frequency independent under the conditions of strong electron scattering caused by static defects is explained by the decisive role of electron -electron collisions in forming the distribution function. The characteristic time of resistance change, obtained experimentally, corresponds to the relaxation time of the order parameter near the superconducting transition and to the relaxation time of the nonelastic electron-phonon interaction at lower temperatures and in lower magnetic fields. | ||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1709 | |||
| Permanent link to this record | |||||
| Author | Aksaev, E. E.; Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. | ||||
| Title | Interaction of electrons with thermal phonons in YBa2Cu3O7-δ films at low temperatures | Type | Journal Article | ||
| Year | 1989 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
| Volume |
50 | Issue | 5 | Pages | 283-286 |
| Keywords | YBCO HTS films | ||||
| Abstract | The time of electron-phonon interaction tau(eph) in YBaCuO films at low temperatures is studied. This is measured as the time of resistance relaxation in the resistive state of the superconducter, and is also determined from the increase in resistance under the action of radiation. Consistent results of these methods show that resistance relaxation in the resistive state is caused by cooling of the electron subsystem with respect to the phonon subsystem. The time tau(eph) is found to be inversely proportional to the temperature and comes to 80 ps when T = 1.6 K and 5 ps when T = 30 K. 6 refs. | ||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1690 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Multanovskii, V. V.; Ptitsyna, N. G. | ||||
| Title | Capture of photoexcited carriers by shallow impurity centers in germanium | Type | Journal Article | ||
| Year | 1979 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
50 | Issue | 4 | Pages | 728-734 |
| Keywords | Ge, photoexcited carriers, shallow impurity centers | ||||
| Abstract | Measurements were made of the lifetimes rf of free carriers and the relaxation time 7, of the submillimeter impurity photoconductivity when carriers are captured by attracting shallow donors and acceptom in Ge. It is nod that in samples with capture-center concentration N,Z 10"cm-' the relaxation time 7, greatly exceeds rf in the temperature range 4.2-12 K. The measured values of 7,- are compared with the calculation of cascade recombination by the classical model. To evaluate the data on T,, the distinguishing features of this model are considered for the nonstationary case. The substantial difference betweea the values of rf and T, is attributed to re-emission of the carriers from the excited states of the shallow impurities. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1720 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G. | ||||
| Title | Population and lifetime of excited states of shallow impurities in Ge | Type | Journal Article | ||
| Year | 1979 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
49 | Issue | 2 | Pages | 355-362 |
| Keywords | Ge, photothermal ionization, shallow impurities | ||||
| Abstract | An investigation was made of the dependences of the intensities of photothermal ionization lines of excited states of shallow impurities in Ge on the intensity of impurity-absorbed background radiation and on temperature. The results obtained were used to find the density and lifetime of carriers of lower excited states of the impurity centers. The lifetimes of the excited states of donors in Ge were 10-~-10-" sec and the lifetime of the lower excited state of acceptors was -lo-' sec. In the presence of background radiation the population of the excited states was very different from the equilibrium value and, in particular, a population inversion of the 2pk, state relative to the 3p0 and 3s states was observed. | ||||
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| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1719 | |||
| Permanent link to this record | |||||
| Author | Finkel, M. I.; Maslennikov, S. N.; Gol'tsman, G. N. | ||||
| Title | Terahertz heterodyne receivers based on superconductive hot-electron bolometer mixers | Type | Journal Article | ||
| Year | 2005 | Publication | Radiophys. Quant. Electron. | Abbreviated Journal | Radiophys. Quant. Electron. |
| Volume |
48 | Issue | 10-11 | Pages | 859-864 |
| Keywords | HEB, applications | ||||
| Abstract | We consider recent results in development of hot-electron bolometer mixers. Special attention is paid to optimization of the contacts between the antenna and the active area of a superconducting film. An important result in the study of the parasitic effect of direct detection is obtained during the measurement of the noise temperatures by the hot/cold load method. The latest results of studies of the waveguide hot-electron bolometer mixers and their successful practical applications are considered. Progress in development of high-frequency (over 1.3 THz) heterodyne receivers for several important international projects is discussed and new submillimeter radio astronomy projects ESPRIT and SAFIR are described. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0033-8443 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 381 | |||
| Permanent link to this record | |||||
| Author | Kawamura, J.; Blundell, R.; Tong, C.-Y. E.; Papa, D. C.; Hunter, T. R.; Paine, S. N.; Patt, F.; Gol'tsman, G.; Cherednichenko, S.; Voronov, B.; Gershenzon, E. | ||||
| Title | Superconductive hot-electron-bolometer mixer receiver for 800-GHz operation | Type | Journal Article | ||
| Year | 2000 | Publication | IEEE Trans. Microw. Theory Techn. | Abbreviated Journal | IEEE Trans. Microw. Theory Techn. |
| Volume |
48 | Issue | 4 | Pages | 683-689 |
| Keywords | NbN HEB mixers, LO power, local oscillator power, saturation, linearity, dynamic range | ||||
| Abstract | In this paper, we describe a superconductive hot-electron-bolometer mixer receiver designed to operate in the partially transmissive 350-μm atmospheric window. The receiver employs an NbN thin-film microbridge as the mixer element, in which the main cooling mechanism of the hot electrons is through electron-phonon interaction. At a local-oscillator frequency of 808 GHz, the measured double-sideband receiver noise temperature is TRX=970 K, across a 1-GHz intermediate-frequency bandwidth centered at 1.8 GHz. We have measured the linearity of the receiver and the amount of local-oscillator power incident on the mixer for optimal operation, which is PLO≈1 μW. This receiver was used in making observations as a facility instrument at the Heinrich Hertz Telescope, Mt. Graham, AZ, during the 1998-1999 winter observing season. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0018-9480 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ lobanovyury @ | Serial | 573 | ||
| Permanent link to this record | |||||
| Author | Chuprina, I. N.; An, P. P.; Zubkova, E. G.; Kovalyuk, V. V.; Kalachev, A. A.; Gol'tsman, G. N. | ||||
| Title | Optimisation of spontaneous four-wave mixing in a ring microcavity | Type | Conference Article | ||
| Year | 2017 | Publication | J. Phys.: Conf. Ser. | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume |
47 | Issue | 10 | Pages | 887-891 |
| Keywords | ring microcavity | ||||
| Abstract | Abstract. A theory of spontaneous four-wave mixing in a ring microcavity is developed. The rate of emission of biphotons for pulsed and monochromatic pumping with allowance for the disper- sion of group velocities is analytically calculated. In the first case, pulses in the form of an increasing exponential are considered, which are optimal for excitation of an individual resonator mode. The behaviour of the group velocity dispersion as a function of the width and height of the waveguide is studied for a specific case of a ring microcavity made of silicon nitride. The results of the numeri- cal calculation are in good agreement with the experimental data. The ring microcavity is made of two types of waveguides: com- pletely etched and half etched. It is found that the latter allow for better control over the parameters in the manufacturing process, making them more predictable. | ||||
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| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ kovalyuk @ | Serial | 1142 | ||
| Permanent link to this record | |||||
| Author | Gol'tsman, G. N.; Loudkov, D. N. | ||||
| Title | Terahertz superconducting hot-electron bolometer mixers and their application in radio astronomy | Type | Journal Article | ||
| Year | 2003 | Publication | Radiophys. Quant. Electron. | Abbreviated Journal | |
| Volume |
46 | Issue | 8/9 | Pages | 604-617 |
| Keywords | NbN HEB mixers | ||||
| Abstract | We review the latest developments, research, and radioastronomy applications of hot-electron bolometer (HEB) mixers operated in the terahertz waveband. The physical principles of operation of terahertz HEB mixers are presented, their manufacturing from ultrathin NbN films, the main HEB-mixer parameters and their measurement techniques are discussed, and practical terahertz radioastronomy projects based on heterodyne receivers with HEB mixers are considered. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0033-8443 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | UDC 537.312.62 | Approved | no | ||
| Call Number | Serial | 472 | |||
| Permanent link to this record | |||||
| Author | Morozov, P.; Lukina, M.; Shirmanova, M.; Divochiy, A.; Dudenkova, V.; Gol'tsman, G. N.; Becker, W.; Shcheslavskiy, V. I. | ||||
| Title | Singlet oxygen phosphorescence imaging by superconducting single-photon detector and time-correlated single-photon counting | Type | Journal Article | ||
| Year | 2021 | Publication | Opt. Lett. | Abbreviated Journal | Opt. Lett. |
| Volume |
46 | Issue | 6 | Pages | 1217-1220 |
| Keywords | SSPD, SNSPD, applications | ||||
| Abstract | This Letter presents, to the best of our knowledge, a novel optical configuration for direct time-resolved measurements of luminescence from singlet oxygen, both in solutions and from cultured cells on photodynamic therapy. The system is based on the superconducting single-photon detector, coupled to the confocal scanner that is modified for the near-infrared measurements. The recording of a phosphorescence signal from singlet oxygen at 1270 nm has been done using time-correlated single-photon counting. The performance of the system is verified by measuring phosphorescence from singlet oxygen generated by the photosensitizers commonly used in photodynamic therapy: methylene blue and chlorin e6. The described system can be easily upgraded to the configuration when both phosphorescence from singlet oxygen and fluorescence from the cells can be detected in the imaging mode. Thus, co-localization of the signal from singlet oxygen with the areas inside the cells can be done. | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0146-9592 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:33720151 | Approved | no | ||
| Call Number | Serial | 1221 | |||
| Permanent link to this record | |||||
| Author | Słysz, W.; Węgrzecki, M.; Bar, J.; Grabiec, P.; Gol'tsman, G. N.; Verevkin, A.; Sobolewski, R. | ||||
| Title | NbN superconducting single-photon detector coupled with a communication fiber | Type | Journal Article | ||
| Year | 2005 | Publication | Elektronika : konstrukcje, technologie, zastosowania | Abbreviated Journal | |
| Volume |
46 | Issue | 6 | Pages | 51-52 |
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | We present novel superconducting single-photon detectors (SSPDs), based on ultrathin NbN films, designed for fiber-based quantum communications (lambda = 1.3 žm and 1.55 žm). For fiber-based operation, our SSPDs contain a special micromechanical construction integrated with the NbN structure, which enables efficient and mechanically very stabile fiber coupling. The detectors combine GHz counting rate, high quantum efficiency and very low level of dark counts. At 1.3 – 1.55 žm wavelength range our detector exhibits a quantum efficiency up to 10%. | ||||
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| Language | Polish | Summary Language | Original Title | ||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1481 | |||
| Permanent link to this record | |||||
| Author | Il'in, K. S.; Karasik, B. S.; Ptitsina, N. G.; Sergeev, A. V.; Gol'tsman, G. N.; Gershenzon, E. M.; Pechen, E. V.; Krasnosvobodtsev, S. I. | ||||
| Title | Electron-phonon-impurity interference in thin NbC films: electron inelastic scattering time and corrections to resistivity | Type | Conference Article | ||
| Year | 1996 | Publication | Czech. J. Phys. | Abbreviated Journal | Czech. J. Phys. |
| Volume |
46 | Issue | S2 | Pages | 857-858 |
| Keywords | NbC films | ||||
| Abstract | Complex study of transport properties of impure NbC films with the electron mean free pathl=0.6–13 nm show the crucial role of the electron-phonon-impurity interference (EPII). In the temperature range 20–70 K we found the interference correction to resistivity proportional to T2 and to the residual resistivity of the film. Using the comprehensive theory of EPII, we determine the electron coupling with transverse phonons and calculate the electron inelastic scattering time. Direct measurements of the inelastic electron scattering time using a response to a high-frequency amplitude modulated cw radiation agree well with the theory. | ||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0011-4626 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1617 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Karasik, B. S.; Semenov, A. D. | ||||
| Title | Measurement of the energy gap in the compound YBaCu3O9-δ on the basis of the IR absorption spectrum | Type | Journal Article | ||
| Year | 1987 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
| Volume |
46 | Issue | 5 | Pages | 237-238 |
| Keywords | YBCO HTS detectors | ||||
| Abstract | For the first time the long-wave infrared absorption spectrum has been measured by means of the bolometric effect and energy gap for high-temperature superconducting ceramics YBa/sub 2/Cu/sub 3/O/sub 9-delta/ has been determined from absorption threshold. 2delta/kT/sub c/ value is equal to 0.6. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1703 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gershenzon, M. E.; Gol'tsman, G. N.; Karasik, B. S.; Semenov, A. D.; Sergeev, A. V. | ||||
| Title | Light-induced heating of electrons and the time of the inelastic electron-phonon scattering in the YBaCuO compound | Type | Journal Article | ||
| Year | 1987 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
| Volume |
46 | Issue | 6 | Pages | 285-287 |
| Keywords | YBCO HTS HEB | ||||
| Abstract | For the first time, measurements have been made on the electron energy relaxation time due to the electron--phonon interaction in films of the YBaCuO superconductor. The results indicate a significant intensification of the electron--phonon interaction in this compound as compared with normal superconducting metals. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1706 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Kagane, M. L. | ||||
| Title | Energy spectrum of acceptors in germanium and its response to a magnetic field | Type | Journal Article | ||
| Year | 1977 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
45 | Issue | 4 | Pages | 769-776 |
| Keywords | p-Ge, photoconductivity, energy spectrum, magnetic field | ||||
| Abstract | We investigated the spectrum of the submillimeter photoconductivity of p-Ge at helium temperatures and the effects of a magnetic field up to 40 kOe on the spectrum. A large number of lines of transitions between the excited states of the acceptors was observed, some of the lines were identified, and the energies of a number of spectral levels B, Al, Ga, In, and TI in Ge were identified. The results are compared with calculations and with experimental data obtained from the spectra of the photoexcitation of the ground state of the impurities. Using one transition as an example, we discuss the splitting of the excited states of acceptors in the magnetic field and under uniaxial compression. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1727 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Elant'ev, A. I. | ||||
| Title | Energy spectrum of the donors in GaAs and Ge and its reaction to a magnetic field | Type | Journal Article | ||
| Year | 1977 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
45 | Issue | 3 | Pages | 555-565 |
| Keywords | Ge, GaAs, magnetic field, donors, energy spectrum | ||||
| Abstract | The spectrum of the submillimeter photoconductivity of n-GaAs and n-Ge in a magnetic field up to 60 kOe at helium temperatures was investigated. A large number of lines due to transitions between excited states of the donors have been investigated, and the measurement results were used to determine a number of levels of the energy spectrum in a wide range of magnetic fields. For GaAs, these data are compared with calculations of the energy spectrum of the hydrogen atom in magnetic fields up to -2X lo9 Oe. For the donors in Ge, the energy spectrum is investigated at different orientations of the magnetic field relative to the crystallographic axes (H 11 [loo], [I 1 I], [110]), and these results are also compared with the corresponding calculations. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1728 | |||
| Permanent link to this record | |||||
| Author | Milostnaya, I.; Korneev, A.; Rubtsova, I.; Seleznev, V.; Minaeva, O.; Chulkova, G.; Okunev, O.; Voronov, B.; Smirnov, K.; Gol'tsman, G.; Slysz, W.; Wegrzecki, M.; Guziewicz, M.; Bar, J.; Gorska, M.; Pearlman, A.; Kitaygorsky, J.; Cross, A.; Sobolewski, R. | ||||
| Title | Superconducting single-photon detectors designed for operation at 1.55-µm telecommunication wavelength | Type | Conference Article | ||
| Year | 2006 | Publication | J. Phys.: Conf. Ser. | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume |
43 | Issue | Pages | 1334-1337 | |
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | We report on our progress in development of superconducting single-photon detectors (SSPDs), specifically designed for secure high-speed quantum communications. The SSPDs consist of NbN-based meander nanostructures and operate at liquid helium temperatures. In general, our devices are capable of GHz-rate photon counting in a spectral range from visible light to mid-infrared. The device jitter is 18 ps and dark counts can reach negligibly small levels. The quantum efficiency (QE) of our best SSPDs for visible-light photons approaches a saturation level of ~30-40%, which is limited by the NbN film absorption. For the infrared range (1.55µm), QE is ~6% at 4.2 K, but it can be significantly improved by reduction of the operation temperature to the 2-K level, when QE reaches ~20% for 1.55-µm photons. In order to further enhance the SSPD efficiency at the wavelength of 1.55 µm, we have integrated our detectors with optical cavities, aiming to increase the effective interaction of the photon with the superconducting meander and, therefore, increase the QE. A successful effort was made to fabricate an advanced SSPD structure with an optical microcavity optimized for absorption of 1.55 µm photons. The design consisted of a quarter-wave dielectric layer, combined with a metallic mirror. Early tests performed on relatively low-QE devices integrated with microcavities, showed that the QE value at the resonator maximum (1.55-µm wavelength) was of the factor 3-to-4 higher than that for a nonresonant SSPD. Independently, we have successfully coupled our SSPDs to single-mode optical fibers. The completed receivers, inserted into a liquid-helium transport dewar, reached ~1% system QE for 1.55 µm photons. The SSPD receivers that are fiber-coupled and, simultaneously, integrated with resonators are expected to be the ultimate photon counters for optical quantum communications. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1742-6588 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1450 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G. | ||||
| Title | Investigation of free excitons in Ge and their condensation at submillimeter wavelengths | Type | Journal Article | ||
| Year | 1976 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
43 | Issue | 1 | Pages | 116-122 |
| Keywords | Ge, free excitons | ||||
| Abstract | Results are presented of an investigation of free excitons in Ge in the submillimeter wavelength range for low as well as for high excitation levels when interaction between the excitons becomes important. The free-exciton energy spectrum is discussed. It is shown that the drop radii and their concentrations can be determined by measuring the temperature dependence of the free-exciton concentration. A section of the phase diagram is obtained in the 0.5-2.8 K temperature range for the free excitons+condensate system. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1731 | |||
| Permanent link to this record | |||||
| Author | Tret'yakov, I. V.; Kaurova, N. S.; Voronov, B. M.; Anfert'ev, V. A.; Revin, L. S.; Vaks, V. L.; Gol'tsman, G. N. | ||||
| Title | The influence of the diffusion cooling on the noise band of the superconductor NbN hot-electron bolometer operating in the terahertz range | Type | Journal Article | ||
| Year | 2016 | Publication | Tech. Phys. Lett. | Abbreviated Journal | |
| Volume |
42 | Issue | 6 | Pages | 563-566 |
| Keywords | HEB, noise bandwidth, conversion gain bandwidth, noise temperature, Andreev reflection | ||||
| Abstract | Results of an experimental study of the noise temperature (Tn) and noise bandwidth (NBW) of the superconductor NbN hot-electron bolometer (HEB) mixer as a function of its temperature (Tb) are presented. It was determined that the NBW of the mixer is significantly wider at temperatures close to the critical ones (Tc) than are values measured at 4.2 K. The NBW of the mixer measured at the heterodyne frequency of 2.5 THz at temperature Tb close to Tc was ~13 GHz, as compared with 6 GHz at Tb = 4.2 K. This experiment clearly demonstrates the limitation of the thermal flow from the NbN bridge at Tb â‰<aa> Tc for mixers manufactured by the in situ technique. This limitation is close in its nature to the Andreev reflection on the superconductor/ metal boundary. In this case, the noise temperature of the studied mixer increased from 1100 to 3800 K. | ||||
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| Series Editor | Series Title | Abbreviated Series Title | |||
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| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1106 | |||
| Permanent link to this record | |||||
| Author | Boyarskii, D. A.; Gershenzon, V. E.; Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G.; Tikhonov, V. V.; Chulkova, G. M. | ||||
| Title | On the possibility of determining the microstructural parameters of an oil-bearing layer from radiophysical measurement data | Type | Journal Article | ||
| Year | 1996 | Publication | J. of Communications Technology and Electronics | Abbreviated Journal | J. of Communications Technology and Electronics |
| Volume |
41 | Issue | 5 | Pages | 408-414 |
| Keywords | submillimeter waves, transmission | ||||
| Abstract | A method for the reconstruction of microstructural properties of an oil-bearing rock from the spectral dependence of the transmission factor of submillimeter waves is proposed. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1064-2269 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Радиотехника и электроника 41, no. 4 (1996): 441-447 | Approved | no | ||
| Call Number | Serial | 1611 | |||
| Permanent link to this record | |||||
| Author | Gol'tsman, G. N. | ||||
| Title | Hot electron bolometric mixers: new terahertz technology | Type | Journal Article | ||
| Year | 1999 | Publication | Infrared Physics & Technology | Abbreviated Journal | Infrared Physics & Technology |
| Volume |
40 | Issue | 3 | Pages | 199-206 |
| Keywords | NbN HEB mixers | ||||
| Abstract | This paper presents an overview of recent results for NbN phonon-cooled hot electron bolometric (HEB) mixers. The noise temperature of the receivers based on both quasioptical and waveguide versions of HEB mixers has crossed the level of 1 K GHz−1 at 430 GHz (410 K), 600–650 GHz (480 K), 750 GHz (600 K), 810 GHz (780 K) and is close to that level at 1.1 THz (1250 K) and 2.5 THz (4500 K). The gain bandwidth measured for quasioptical HEB mixer at 620 GHz reached 4 GHz and the noise temperature bandwidth was almost 8 GHz. Local oscillator power requirements are about 1 μW for mixers made by photolithography and about 100 nW for mixers made by e-beam lithography. A waveguide version of 800 GHz receiver was installed at the Submillimeter Telescope Observatory on Mt. Graham, AZ, to conduct astronomical observations of known submillimeter lines (CO, J=7→6, CI, J=2→1). It was proved that the receiver works as a practical instrument. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1350-4495 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1570 | |||
| Permanent link to this record | |||||
| Author | Zhang, J.; Boiadjieva, N.; Chulkova, G.; Deslandes, H.; Gol'tsman, G. N.; Korneev, A.; Kouminov, P.; Leibowitz, M.; Lo, W.; Malinsky, R.; Okunev, O.; Pearlman, A.; Slysz, W.; Smirnov, K.; Tsao, C.; Verevkin, A.; Voronov, B.; Wilsher, K.; Sobolewski, R. | ||||
| Title | Noninvasive CMOS circuit testing with NbN superconducting single-photon detectors | Type | Journal Article | ||
| Year | 2003 | Publication | Electron. Lett. | Abbreviated Journal | Electron. Lett. |
| Volume |
39 | Issue | 14 | Pages | 1086-1088 |
| Keywords | NbN SSPD, SNSPD, applications | ||||
| Abstract | The 3.5 nm thick-film, meander-structured NbN superconducting single-photon detectors have been implemented in the CMOS circuit-testing system based on the detection of near-infrared photon emission from switching transistors and have significantly improved the performance of the system. Photon emissions from both p- and n-MOS transistors have been observed. | ||||
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| Language | Summary Language | Original Title | |||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0013-5194 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1512 | |||
| Permanent link to this record | |||||
| Author | Manova, N. N.; Korneeva, Yu. P.; Korneev, A. A.; Slysz, W.; Voronov, B. M.; Gol'tsman, G. N. | ||||
| Title | Superconducting NbN single-photon detector integrated with quarter-wave resonator | Type | Journal Article | ||
| Year | 2011 | Publication | Tech. Phys. Lett. | Abbreviated Journal | Tech. Phys. Lett. |
| Volume |
37 | Issue | 5 | Pages | 469-471 |
| Keywords | SSPD, SNSPD | ||||
| Abstract | The spectral dependence of the quantum efficiency of superconducting NbN single-photon detectors integrated with quarter-wave resonators based on Si3N4, SiO2, and SiO layers has been studied. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ gujma @ | Serial | 664 | ||
| Permanent link to this record | |||||
| Author | Slysz, W.; Wegrzecki, M.; Bar, J.; Grabiec, P.; Gol'tsman, G. N.; Verevkin, M.; Sobolewski, R. | ||||
| Title | NbN superconducting single-photon detectors coupled with a communication fiber | Type | Miscellaneous | ||
| Year | 2004 | Publication | INIS | Abbreviated Journal | INIS |
| Volume |
37 | Issue | 2 | Pages | 1-2 |
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | |||||
| Address | Stare Jablonki, Poland | ||||
| Corporate Author | Thesis | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | 8-th Electron Technology Conference ELTE | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1486 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G. | ||||
| Title | Submillimeter spectroscopy of semiconductors | Type | Journal Article | ||
| Year | 1973 | Publication | Sov. Phys. JETP | Abbreviated Journal | Sov. Phys. JETP |
| Volume |
37 | Issue | 2 | Pages | 299-304 |
| Keywords | semiconductors, submillimeter spectroscopy, spectrometer, BWO, Ge, free excitons | ||||
| Abstract | The possibility is considered of carrying out submillimeter-wave spectral investigations of semiconductors by means of a high resolution spectrometer with backward-wave tubes. Results of a study of the excitation spectra of small impurities, D-(A +) centers and free excitons in germanium are presented. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1735 | |||
| Permanent link to this record | |||||
| Author | Slysz, W.; Wegrzecki, M.; Papis, E.; Gol'tsman, G. N.; Verevkin, A.; Sobolewski, R. | ||||
| Title | A method of optimization of the NbN superconducting single-photon detector | Type | Miscellaneous | ||
| Year | 2004 | Publication | INIS | Abbreviated Journal | INIS |
| Volume |
36 | Issue | 27 | Pages | 1-2 |
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | |||||
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| Area | Expedition | Conference | 5-th International Symposium Ion Implantation and Other Applications of Ions and Electrons, ION | ||
| Notes | Reference num. 36060124 | Approved | no | ||
| Call Number | Serial | 1485 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gershenzon, M. E.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. | ||||
| Title | Nonselective effect of electromagnetic radiation on a superconducting film in the resistive state | Type | Journal Article | ||
| Year | 1982 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
| Volume |
36 | Issue | 7 | Pages | 296-299 |
| Keywords | HEB | ||||
| Abstract | |||||
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| Notes | Неселективное воздействие электромагнитного излучения на сверхпроводящую пленку в резистивном состоянии | Approved | no | ||
| Call Number | Serial | 1717 | |||
| Permanent link to this record | |||||
| Author | Korneev, A.; Minaeva, O.; Rubtsova, I.; Milostnaya, I.; Chulkova, G.; Voronov, B.; Smirnov, K.; Seleznev, V.; Gol'tsman, G.; Pearlman, A.; Slysz, W.; Cross, A.; Alvarez, P.; Verevkin, A.; Sobolewski, R. | ||||
| Title | Superconducting single-photon ultrathin NbN film detector | Type | Journal Article | ||
| Year | 2005 | Publication | Quantum Electronics | Abbreviated Journal | |
| Volume |
35 | Issue | 8 | Pages | 698-700 |
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | Superconducting single-photon ultrathin NbN film detectors are studied. The development of manufacturing technology of detectors and the reduction of their operating temperature down to 2 K resulted in a considerable increase in their quantum efficiency, which reached in the visible region (at 0.56 μm) 30%—40%, i.e., achieved the limit determined by the absorption coefficient of the film. The quantum efficiency exponentially decreases with increasing wavelength, being equal to ~20% at 1.55 μm and ~0.02% at 5 μm. For the dark count rate of ~10-4s-1, the experimental equivalent noise power was 1.5×10-20 W Hz-1/2; it can be decreased in the future down to the record low value of 5×10-21 W Hz-1/2. The time resolution of the detector is 30 ps. | ||||
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| Notes | Сверхпроводящий однофотонный детектор на основе ультратонкой пленки NbN | Approved | no | ||
| Call Number | Serial | 383 | |||
| Permanent link to this record | |||||
| Author | Aksaev, E. E.; Gershenzon, E.M.; Gol'tsman, G. N.; Mirskij, G. I.; Semenov, A. D. | ||||
| Title | Submillimetric spectrometer-relaxometer based on backward-wave tubes with picosecond time resolution | Type | Journal Article | ||
| Year | 1991 | Publication | Pribory i Tekhnika Eksperimenta | Abbreviated Journal | Pribory i Tekhnika Eksperimenta |
| Volume |
34 | Issue | 2 | Pages | 125-131 |
| Keywords | BWO, applications | ||||
| Abstract | The high-sensitive automatic spectrometer-relaxometer based on backward-wave tubes in the range of 4÷0.25 mm was described permitting to study the response kinetics of sample under investigation in any point of this range with the resolution time of 10-11 s. The relaxation measurements were conducted using oscillation beats of two adequate tubes, the frequency of one of them was fixed, while that of the other one was changeable. The amplitude-frequency characteristic of the response under the conditions of synchronous reception was recorded at beat frequency variation from 107 to 1010 Hz. The high sensitivity was reached by decreasing the device recording band down to 100 Hz in the whole measuring range. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0032-8162 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1683 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E.; Gershenzon, M. E.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. | ||||
| Title | Heating of quasiparticles in a superconducting film in the resistive state | Type | Journal Article | ||
| Year | 1981 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
| Volume |
34 | Issue | 5 | Pages | 268-271 |
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1716 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Multanovskii, V. V.; Ptitsina, N. G. | ||||
| Title | Cross section for binding of free carriers into excitons in germanium | Type | Journal Article | ||
| Year | 1981 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
| Volume |
33 | Issue | 11 | Pages | 574 |
| Keywords | Ge, excitons, photoconductivity | ||||
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| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1718 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. | ||||
| Title | Heating of electrons in resistive state of superconducting films. Detectors, mixers and switches | Type | Conference Article | ||
| Year | 1992 | Publication | Progress in High Temperature Superconductivity | Abbreviated Journal | Progress in High Temperature Superconductivity |
| Volume |
32 | Issue | Pages | 190-195 | |
| Keywords | superconducting films, heating of electrons | ||||
| Abstract | |||||
| Address | |||||
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| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
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| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | International Conference on High Temperature Superconductivity and Localization Phenomena , Moscow, Russia , 11 – 15 May 1991 | ||
| Notes | https://books.google.co.kr/books?hl=en&lr=&id=uCI0DwAAQBAJ&oi=fnd&pg=PA190&ots=z7WGjXYWr4&sig=TQ6G6dKsmcj4faYe1ZLw_BFmps8 | Approved | no | ||
| Call Number | Serial | 1666 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Mirskii, G. I. | ||||
| Title | Submillimeter backward-wave-tube spectrometer-relaxometer | Type | Journal Article | ||
| Year | 1987 | Publication | Pribory i Tekhnika Eksperimenta | Abbreviated Journal | Pribory i Tekhnika Eksperimenta |
| Volume |
30 | Issue | 4 | Pages | 131-137 |
| Keywords | BWO, applications | ||||
| Abstract | A backward-wave-tube (BWT) spectrometer-relaxometer is described that is designed for study of the relaxation characteristics of photoconductors in the wavelength range of 2-0.25 mm – in particular, to measure the relaxation times of the submillimeter photoconductivity of germanium in the range of 10[sup:-4]-10[sup:-9] sec and to determine from these data the concentration of compensating impurities of from 10[sup:10] to 10[sup:14] cm[sup:-3]. The instrument uses the beats of the oscillations of two BWTs and records the amplitude-frequency response of the specimen with variation of the beat frequency from 10[sup:4] to 10[sup:8] Hz with accumulation of the desired signal for less than or equal to1 sec by means of a quadrature synchronous detector. The beat frequency is stabilized and the quadrature voltages of the synchronous detector are formed by means of phase-locked loops. | ||||
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| Language | Russian | Summary Language | Original Title | ||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1699 | |||
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| Author | Polyakova, M.; Semenov, A. V.; Kovalyuk, V.; Ferrari, S.; Pernice, W. H. P.; Gol'tsman, G. N. | ||||
| Title | Protocol of measuring hot-spot correlation length for SNSPDs with near-unity detection efficiency | Type | Journal Article | ||
| Year | 2019 | Publication | IEEE Trans. Appl. Supercond. | Abbreviated Journal | IEEE Trans. Appl. Supercond. |
| Volume |
29 | Issue | 5 | Pages | 1-5 |
| Keywords | SSPD, waveguide-integrated SNSPD, hot-spot interaction length | ||||
| Abstract | We present a simple quantum detector tomography protocol, which allows, without ambiguities, to measure the two-spot detection efficiency and extract the hot-spot interaction length of superconducting nanowire single photon detectors (SNSPDs) with unity intrinsic detection efficiency. We identify a significant parasitic contribution to the measured two-spot efficiency, related to an effect of the bias circuit, and find a way to rule out this contribution during data post-processing and directly in the experiment. From the data analysis for waveguide-integrated SNSPD, we find signatures of the saturation of the two-spot efficiency and hot-spot interaction length of order of 100 nm. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1051-8223 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1187 | |||
| Permanent link to this record | |||||
| Author | Lobanov, Y.; Shcherbatenko, M.; Semenov, A.; Kovalyuk, V.; Kahl, O.; Ferrari, S.; Korneev, A.; Ozhegov, R.; Kaurova, N.; Voronov, B. M.; Pernice, W. H. P.; Gol'tsman, G. N. | ||||
| Title | Superconducting nanowire single photon detector for coherent detection of weak signals | Type | Journal Article | ||
| Year | 2017 | Publication | IEEE Trans. Appl. Supercond. | Abbreviated Journal | IEEE Trans. Appl. Supercond. |
| Volume |
27 | Issue | 4 | Pages | 1-5 |
| Keywords | NbN SSPD mixer, SNSPD, nanophotonic waveguide | ||||
| Abstract | Traditional photon detectors are operated in the direct detection mode, counting incident photons with a known quantum efficiency. Here, we have investigated a superconducting nanowire single photon detector (SNSPD) operated as a photon counting mixer at telecommunication wavelength around 1.5 μm. This regime of operation combines excellent sensitivity of a photon counting detector with excellent spectral resolution given by the heterodyne technique. Advantageously, we have found that low local oscillator (LO) power of the order of hundreds of femtowatts to a few picowatts is sufficient for clear observation of the incident test signal with the sensitivity approaching the quantum limit. With further optimization, the required LO power could be significantly reduced, which is promising for many practical applications, such as the development of receiver matrices or recording ultralow signals at a level of less-than-one-photon per second. In addition to a traditional NbN-based SNSPD operated with normal incidence coupling, we also use detectors with a travelling wave geometry, where a NbN nanowire is placed on the top of a Si 3 N 4 nanophotonic waveguide. This approach is fully scalable and a large number of devices could be integrated on a single chip. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1051-8223 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1206 | |||
| Permanent link to this record | |||||
| Author | Arutyunov, K. Y.; Ramos-Alvarez, A.; Semenov, A. V.; Korneeva, Y. P.; An, P. P.; Korneev, A. A.; Murphy, A.; Bezryadin, A.; Gol'tsman, G. N. | ||||
| Title | Superconductivity in highly disordered NbN nanowires | Type | Journal Article | ||
| Year | 2016 | Publication | Nanotechnol. | Abbreviated Journal | Nanotechnol. |
| Volume |
27 | Issue | 47 | Pages | 47lt02 (1 to 8) |
| Keywords | NbN nanowires | ||||
| Abstract | The topic of superconductivity in strongly disordered materials has attracted significant attention. These materials appear to be rather promising for fabrication of various nanoscale devices such as bolometers and transition edge sensors of electromagnetic radiation. The vividly debated subject of intrinsic spatial inhomogeneity responsible for the non-Bardeen-Cooper-Schrieffer relation between the superconducting gap and the pairing potential is crucial both for understanding the fundamental issues of superconductivity in highly disordered superconductors, and for the operation of corresponding nanoelectronic devices. Here we report an experimental study of the electron transport properties of narrow NbN nanowires with effective cross sections of the order of the debated inhomogeneity scales. The temperature dependence of the critical current follows the textbook Ginzburg-Landau prediction for the quasi-one-dimensional superconducting channel I c approximately (1-T/T c)(3/2). We find that conventional models based on the the phase slip mechanism provide reasonable fits for the shape of R(T) transitions. Better agreement with R(T) data can be achieved assuming the existence of short 'weak links' with slightly reduced local critical temperature T c. Hence, one may conclude that an 'exotic' intrinsic electronic inhomogeneity either does not exist in our structures, or, if it does exist, it does not affect their resistive state properties, or does not provide any specific impact distinguishable from conventional weak links. | ||||
| Address | National Research University Higher School of Economics, Moscow Institute of Electronics and Mathematics,109028, Moscow, Russia. P L Kapitza Institute for Physical Problems RAS, Moscow, 119334, Russia | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0957-4484 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:27782000 | Approved | no | ||
| Call Number | Serial | 1332 | |||
| Permanent link to this record | |||||
| Author | Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D. | ||||
| Title | Submillimeter backward wave tube spectrometer for measuring superconducting film transmission | Type | Journal Article | ||
| Year | 1983 | Publication | Pribory i Tekhnika Eksperimenta | Abbreviated Journal | Pribory i Tekhnika Eksperimenta |
| Volume |
26 | Issue | 5 | Pages | 134-137 |
| Keywords | BWO spectroscopy, spectrometer, transmission | ||||
| Abstract | A spectrometer employing six backward wave tubes is described. It is intended for investigation of superconductors in the 0.2-3 mm range of wave lengths. During the measurement of the transmission spectrum it is possible to determine the energy gap for superconduct1ng films 50 to 4000 A thick. The transmission factor can vary from 10-1 to 10-9. Spectrum of relation of film transmission factors in superconducting and normal states is measured for determining the energy gap 2 Δ. The transmission spectrum obtained by means of a computer for vanadium film 300 A thick is given as an example. The energy gap 2 Δ = 1.4 MeV | ||||
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| Publisher | Place of Publication | Editor | |||
| Language | Russian | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0032-8162 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Субмиллиметровый спектрометр с лампами обратной волны для измерения пропускания сверхпроводниковых пленок | Approved | no | ||
| Call Number | Serial | 1713 | |||
| Permanent link to this record | |||||
| Author | Ferrari, S.; Kovalyuk, V.; Hartmann, W.; Vetter, A.; Kahl, O.; Lee, C.; Korneev, A.; Rockstuhl, C.; Gol'tsman, G.; Pernice, W. | ||||
| Title | Hot-spot relaxation time current dependence in niobium nitride waveguide-integrated superconducting nanowire single-photon detectors | Type | Journal Article | ||
| Year | 2017 | Publication | Opt. Express | Abbreviated Journal | Opt. Express |
| Volume |
25 | Issue | 8 | Pages | 8739-8750 |
| Keywords | SSPD, SNSPD, photon counting; Infrared; Quantum detectors; Integrated optics; Multiphoton processes; Photon statistics | ||||
| Abstract | We investigate how the bias current affects the hot-spot relaxation dynamics in niobium nitride. We use for this purpose a near-infrared pump-probe technique on a waveguide-integrated superconducting nanowire single-photon detector driven in the two-photon regime. We observe a strong increase in the picosecond relaxation time for higher bias currents. A minimum relaxation time of (22 +/- 1)ps is obtained when applying a bias current of 50% of the switching current at 1.7 K bath temperature. We also propose a practical approach to accurately estimate the photon detection regimes based on the reconstruction of the measured detector tomography at different bias currents and for different illumination conditions. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ kovalyuk @ | Serial | 1118 | ||
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| Author | Trifonov, A.; Tong, C.-Y. E.; Blundell, R.; Ryabchun, S.; Gol'tsman, G. | ||||
| Title | Probing the stability of HEB mixers with microwave injection | Type | Journal Article | ||
| Year | 2015 | Publication | IEEE Trans. Appl. Supercond. | Abbreviated Journal | IEEE Trans. Appl. Supercond. |
| Volume |
25 | Issue | 3 | Pages | 2300404 (1 to 4) |
| Keywords | NbN HEB mixer, stability, Allan-variance | ||||
| Abstract | Using a microwave probe as a tool, we have performed experiments aimed at understanding the origin of the output-power fluctuations in hot-electron-bolometer (HEB) mixers. We use a probe frequency of 1.5 GHz. The microwave probe picks up impedance changes of the HEB, which are examined upon demodulation of the reflected wave outside the cryostat. This study shows that the HEB mixer operates in two different regimes under a terahertz pump. At a low pumping level, strong pulse modulation is observed, as the device switches between the superconducting state and the normal state at a rate of a few megahertz. When pumped much harder, to approximate the low-noise mixer operating point, residual modulation can still be observed, showing that the HEB mixer is intrinsically unstable even in the resistive state. Based on these observations, we introduced a low-frequency termination to the HEB mixer. By terminating the device in a 50-Ω resistor in the megahertz frequency range, we have been able to improve the output-power Allan time of our HEB receiver by a factor of four to about 10 s for a detection bandwidth of 15 MHz, with a corresponding gain fluctuation of about 0.035%. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1051-8223 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1355 | |||
| Permanent link to this record | |||||
| Author | Lobanov, Y.; Shcherbatenko, M.; Finkel, M.; Maslennikov, S.; Semenov, A.; Voronov, B. M.; Rodin, A. V.; Klapwijk, T. M.; Gol'tsman, G. N. | ||||
| Title | NbN hot-electron-bolometer mixer for operation in the near-IR frequency range | Type | Journal Article | ||
| Year | 2015 | Publication | IEEE Trans. Appl. Supercond. | Abbreviated Journal | IEEE Trans. Appl. Supercond. |
| Volume |
25 | Issue | 3 | Pages | 2300704 (1 to 4) |
| Keywords | HEB mixer, IR, optical antenna | ||||
| Abstract | Traditionally, hot-electron-bolometer (HEB) mixers are employed for THz and “super-THz” heterodyne detection. To explore the near-IR spectral range, we propose a fiber-coupled NbN film based HEB mixer. To enhance the incident-light absorption, a quasi-antenna consisting of a set of parallel stripes of gold is used. To study the antenna effect on the mixer performance, we have experimentally studied a set of devices with different size of the Au stripe and spacing between the neighboring stripes. With use of the well-known isotherm technique we have estimated the absorption efficiency of the mixer, and the maximum efficiency has been observed for devices with the smallest pitch of the alternating NbN and NbN-Au stripes. Also, a proper alignment of the incident Eâƒ<2014>-field with respect to the stripes allows us to improve the coupling further. Studying IV-characteristics of the mixer under differently-aligned Eâƒ<2014>-field of the incident radiation, we have noticed a difference in their shape. This observation suggests that a difference exists in the way the two waves with orthogonal polarizations parallel and perpendicular Eâƒ<2014>-field to the stripes heat the electrons in the HEB mixer. The latter results in a variation in the electron temperature distribution over the HEB device irradiated by the two waves. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 952 | |||
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