| Records |
| Author |
Hübers, H.-W.; Semenov, A.; Holldack, K.; Schade, U.; Wüstefeld, G.; Gol’tsman, G. |
Title  |
Time domain analysis of coherent terahertz synchrotron radiation |
Type |
Journal Article |
| Year |
2005 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
87 |
Issue |
18 |
Pages |
184103 (1 to 3) |
| Keywords |
NbN HEB mixers, applications |
| Abstract |
The time structure of coherent terahertz synchrotron radiation at the electron storage ring of the Berliner Elektronensynchrotron und Speicherring Gesellschaft has been analyzed with a fast superconducting hot-electron bolometer. The emission from a single bunch of electrons was found to last ∼1500ps at frequencies around 0.4THz, which is much longer than the length of an electron bunch in the time domain (∼5ps). It is suggested that this is caused by multiple reflections at the walls of the beam line. The quadratic increase of the power with the number of electrons in the bunch as predicted for coherent synchrotron radiation and the transition from stable to bursting radiation were determined from a single storage ring fill pattern of bunches with different populations. |
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0003-6951 |
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no |
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Serial |
1457 |
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| Author |
Palma, F.; Teppe, F.; Fatimy, A. E.; Green, R.; Xu, J.; Vachontin, Y.; Tredicucci, A.; Goltsman, G.; Knap, W. |
| Title |
THz communication system based on a THz quantum cascade laser and a hot electron bolometer |
Type |
Conference Article |
| Year |
2010 |
Publication |
35th Int. Conf. Infrared, Millimeter, and Terahertz Waves |
Abbreviated Journal |
35th Int. Conf. Infrared, Millimeter, and Terahertz Waves |
| Volume |
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Issue |
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Pages |
11623798 (1 to 2) |
| Keywords |
QCL, HEB detector |
| Abstract |
We present the experimental study of the direct emission – detection system based on the THz Quantum Cascade Laser as a source and Hot Electron Bolometer (HEB) detector – in view of its application as an optical communication system. We show that the system can efficiently transmit the QCL Terahertz pulses. We estimate the maximal modulation speed of the system to be about several GHz and show that it is limited only by the QCL pulse power supply, detector amplifier and connection line/wires parameters. |
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no |
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Serial |
1391 |
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| Author |
Bardeen, J; Mattis, D. C. |
| Title |
Theory of the anomalous skin effect in normal and superconducting metals |
Type |
Journal Article |
| Year |
1958 |
Publication |
Phys. Rev. |
Abbreviated Journal |
Phys. Rev. |
| Volume |
111 |
Issue |
2 |
Pages |
412-417 |
| Keywords |
local dirty limit, complex conductivity, HEB |
| Abstract |
Chambers' expression for the current density in a normal metal in which the electric field varies over a mean free path is derived from a quantum approach in which use is made of the density matrix in the presence of scattering centers but in the absence of the field. An approximate expression used for the latter is shown to reduce to one derived by Kohn and Luttinger for the case of weak scattering. A general space-and time-varying electromagnetic interaction is treated by first-order perturbation theory. The method is applied to superconductors, and a general expression derived for the kernel of the Pippard integral for fields of arbitrary frequency. The expressions derived can also be used to discuss absorption of electromagnetic radiation in thin superconducting films. |
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no |
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Serial |
937 |
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| Author |
Meledin, D.; Tong, C. Y.-E.; Blundell, R.; Kaurova, N.; Smirnov, K.; Voronov, B.; Gol'tsman, G. |
| Title |
The sensitivity and IF bandwidth of waveguide NbN hot electron bolometer mixers on MgO buffer layers over crystalline quartz |
Type |
Conference Article |
| Year |
2002 |
Publication |
Proc. 13th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 13th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
65-72 |
| Keywords |
waveguide NbN HEB mixers |
| Abstract |
We have developed and characterized waveguide phonon-cooled NbN Hot Electron Bolometer (FMB) mixers fabricated from a 3-4 nm thick NbN film deposited on a 200nm thick MgO buffer layer over crystalline quartz. Double side band receiver noise temperatures of 900-1050 K at 1.035 THz, and 1300-1400 K at 1.26 THz have been measured at an intermediate frequency of 1.5 GHz. The intermediate frequency bandwidth, measured at 0.8 THz LO frequency, is 3.2 GHz at the optimal bias point for low noise receiver operation. |
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Place of Publication |
Cambridge, MA, USA |
Editor |
Harvard university |
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no |
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Serial |
326 |
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| Author |
Dedes, C.; Röllig, M.; Mookerjea, B.; Okada, Y.; Ossenkopf, V.; Bruderer, S.; Benz, A. O.; Melchior, M.; Kramer, C.; Gerin, M.; Güsten, R.; Akyilmaz, M.; Berne, O.; Boulanger, F.; De Lange, G.; Dubbeldam, L.; France, K.; Fuente, A.; Goicoechea, J. R.; Harris, A.; Huisman, R.; Jellema, W.; Joblin, C.; Klein, T.; Le Petit, F.; Lord, S.; Martin, P.; Martin-Pintado, J.; Neufeld, D. A.; Philipp, S.; Phillips, T.; Pilleri, P.; Rizzo, J. R.; Salez, M.; Schieder, R.; Simon, R.; Siebertz, O.; Stutzki, J.; van der Tak, F.; Teyssier, D.; Yorke, H. |
| Title |
The origin of the [C II] emission in the S140 photon-dominated regions. New insights from HIFI |
Type |
Journal Article |
| Year |
2010 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
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| Volume |
521 |
Issue |
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Pages |
L24 |
| Keywords |
HEB mixer applications, HIFI, Herschel, ISM: structure / ISM: kinematics and dynamics / ISM: molecules / photon-dominated region (PDR) / submillimeter: general |
| Abstract |
Using Herschel's HIFI instrument, we observe C ii along a cut through S140, as well as high-J transitions of CO and HCO+ at two positions on the cut, corresponding to the externally irradiated ionization front and the embedded massive star-forming core IRS1. The HIFI data were combined with available ground-based observations and modeled using the KOSMA-Ï„ model for photon-dominated regions (PDRs). We derive the physical conditions in S140 and in particular the origin of C ii emission around IRS1. We identify three distinct regions of C ii emission from the cut, one close to the embedded source IRS1, one associated with the ionization front, and one further into the cloud. The line emission can be understood in terms of a clumpy model of PDRs. At the position of IRS1, we identify at least two distinct components contributing to the [C ii] emission, one of them a small, hot component, which can possibly be identified with the irradiated outflow walls. This is consistent with the C ii peak at IRS1 coinciding with shocked H2 emission at the edges of the outflow cavity. We note that previously available observations of IRS1 can be reproduced well by a single-component KOSMA-Ï„ model. Thus, it is HIFI's unprecedented spatial and spectral resolution, as well as its sensitivity that has allowed us to uncover an additional hot gas component in the S140 region. |
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no |
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Serial |
1091 |
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| 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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Approved |
no |
| Call Number |
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Serial |
1106 |
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| Author |
Vakhtomin, Y. B.; Finkel, M. I.; Antipov, S. V.; Smirnov, K. V.; Kaurova, N. S.; Drakinskii, V. N.; Voronov, B. M.; Gol’tsman, G. N. |
| Title |
The gain bandwidth of mixers based on the electron heating effect in an ultrathin NbN film on a Si substrate with a buffer MgO layer |
Type |
Journal Article |
| Year |
2003 |
Publication |
J. of communications technol. & electronics |
Abbreviated Journal |
J. of communications technol. & electronics |
| Volume |
48 |
Issue |
6 |
Pages |
671-675 |
| Keywords |
NbN HEB mixers |
| Abstract |
Measurements of the intermediate frequency band 900 GHz of mixers based on the electron heating effect (EHE) in 2-nm- and 3.5-nm-thick superconducting NbN films sputtered on MgO and Si substrates with buffer MgO layers are presented. A 2-nm-thick superconducting NbN film with a critical temperature of 9.2 K has been obtained for the first time using a buffer MgO layer. |
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MAIK Nauka/Interperiodica, Birmingham, AL |
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Edition |
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| ISSN |
1064-2269 |
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| Notes |
https://elibrary.ru/item.asp?id=17302119 (Полоса преобразования смесителей на эффекте разогрева электронов в ультратонких пленках NbN на подложках из Si с подслоем MgO) |
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no |
| Call Number |
Vakhtomin2003 |
Serial |
1522 |
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| Author |
Cherednichenko, Sergey; Drakinskiy, Vladimir; Berg, Therese; Kollberg, Erik L.; Angelov, Iltcho |
| Title |
The direct detection effect in the hot-electron bolometer mixer sensitivity calibration |
Type |
Journal Article |
| Year |
2007 |
Publication |
IEEE Trans. Microw. Theory Techn. |
Abbreviated Journal |
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| Volume |
55 |
Issue |
3 |
Pages |
504-510 |
| Keywords |
HEB, mixer, direct detection effect |
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0018-9480 |
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no |
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RPLAB @ lobanovyury @ |
Serial |
555 |
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| Author |
Semenov, Alexei; Richter, Heiko; Smirnov, Konstantin; Voronov, Boris; Gol'tsman, Gregory; Hübers, Heinz-Wilhelm |
| Title |
The development of terahertz superconducting hot-electron bolometric mixers |
Type |
Journal Article |
| Year |
2004 |
Publication |
Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
| Volume |
17 |
Issue |
5 |
Pages |
436-439 |
| Keywords |
NbN HEB mixers |
| Abstract |
We present recent advances in the development of NbN hot-electron bolometric (HEB) mixers for flying terahertz heterodyne receivers. Three important issues have been addressed: the quality of the source NbN films, the effect of the bolometer size on the spectral properties of different planar feed antennas, and the local oscillator (LO) power required for optimal operation of the mixer. Studies of the NbN films with an atomic force microscope indicated a surface structure that may affect the performance of the smallest mixers. Measured spectral gain and noise temperature suggest that at frequencies above 2.5 THz the spiral feed provides better overall performance than the double-slot feed. Direct measurements of the optimal LO power support earlier estimates made in the framework of the uniform mixer model. |
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no |
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Serial |
357 |
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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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no |
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Serial |
1079 |
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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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0033-8443 |
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no |
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Serial |
411 |
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Yagubov, P.; Gol'tsman, G.; Voronov, B.; Seidman, L.; Siomash, V.; Cherednichenko, S.; Gershenzon, E. |
| Title |
The bandwidth of HEB mixers employing ultrathin NbN films on sapphire substrate |
Type |
Conference Article |
| Year |
1996 |
Publication |
Proc. 7th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 7th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
290-302 |
| Keywords |
NbN HEB mixers, fabrication process |
| Abstract |
We report on some unusual features observed during fabrication of ultrathin NbN films with high Tc. The films were used to fabricate HEB mixers, which were evaluated for IF bandwidth measurements at 140 GHz. Ultrathin films were fabricated using reactive dc magnetron sputtering with a discharge current source. Reproducible parameters of the films are assured keeping constant the difference between the discharge voltage in pure argon, and in a gas mixture, for the same current. A maximum bandwidth of 4 GHz at optimal LO and dc bias was obtained for mixer chip based on NbN film 35 A thick with Tc = 11 K. |
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Charlottesville, Virginia, USA |
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no |
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Serial |
266 |
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| Author |
Kawamura, J.; Tong, C.-Y. E.; Blundell, R.; Papa, D. C.; Hunter, T. R.; Patt, F.; Gol’tsman, G.; Gershenzon, E. |
| Title |
Terahertz-frequency waveguide NbN hot-electron bolometer mixer |
Type |
Journal Article |
| Year |
2001 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
| Volume |
11 |
Issue |
1 |
Pages |
952-954 |
| Keywords |
NbN HEB mixers |
| Abstract |
We have developed a low-noise waveguide heterodyne receiver for operation near 1 THz using phonon-cooled NbN hot-electron bolometers. The mixer elements are submicron-sized microbridges of 4 nm-thick NbN film fabricated on a quartz substrate. Operating at a bath temperature of 4.2 K, the double-sideband receiver noise temperature is 760 K at 1.02 THz and 1100 K at 1.26 THz. The local oscillator is provided by solid-state sources, and power measured at the source is less than 1 /spl mu/W. The intermediate frequency bandwidth exceeds 2 GHz. The receiver was used to make the first ground-based heterodyne detection of a celestial spectroscopic line above 1 THz. |
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Edition |
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| ISSN |
1558-2515 |
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no |
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Serial |
1546 |
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| Author |
Gol’tsman, G. N. |
| Title |
Terahertz technology in Russia |
Type |
Conference Article |
| Year |
1994 |
Publication |
24th European Microwave Conf. |
Abbreviated Journal |
24th European Microwave Conf. |
| Volume |
1 |
Issue |
|
Pages |
113-121 |
| Keywords |
BWO, HEB mixers |
| Abstract |
The presentation consider the parameters and operating peculiarities of unique microwave generators of the terahertz range which have been created in Russia – the backward wave oscillators – as well as certain devices based on these generators, such as high resolution. spectrometers and time-resolving spectrometers with picosecond temporal resolution. Most resent BWO-based studies are illustrated by a project devoted to superconductive hot-electron. bolometers which are of great independent value for the terahertz technology as high-sensitive picosecond detectors and low noise broad-band mixers. |
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24th European Microwave Conference |
| Notes |
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no |
| Call Number |
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Serial |
1635 |
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| 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 |
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| Volume |
46 |
Issue |
8/9 |
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604-617 |
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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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0033-8443 |
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| Notes |
UDC 537.312.62 |
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472 |
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