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Author |
Gol'tsman, G. N.; Kouminov, P.; Goghidze, I.; Gershenzon, E. M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Nonequilibrium kinetic inductive response of YBaCuO thin films to low-power laser pulses |
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Journal Article |
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Year |
1994 |
Publication |
Phys. C: Supercond. |
Abbreviated Journal |
Phys. C: Supercond. |
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235-240 |
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1979-1980 |
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YBCO HTS KID |
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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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0921-4534 |
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1634 |
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Author |
Gousev, Y. P.; Semenov, A. D.; Gol'tsman, G. N.; Sergeev, A. V.; Gershenzon, E. M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Electron-phonon interaction in disordered NbN films |
Type |
Journal Article |
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Year |
1994 |
Publication |
Phys. B Condens. Mat. |
Abbreviated Journal |
Phys. B Condens. Mat. |
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194-196 |
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1355-1356 |
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Keywords |
NbN films |
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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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0921-4526 |
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1649 |
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Danerud, M.; Winkler, D.; Zorin, M.; Trifonov, V.; Karasik, B.; Gershenzon, E. M.; Gol'tsman, G. N.; Lindgren, M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Picosecond detection of infrared radiation with YBa2Cu3O7-δ thin films |
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Conference Article |
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Year |
1993 |
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Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
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2104 |
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183-184 |
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YBCO HTS HEB detectors |
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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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Spie |
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Birch, J.R.; Parker, T.J. |
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18th International Conference on Infrared and Millimeter Waves |
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https://inis.iaea.org/search/searchsinglerecord.aspx?recordsFor=SingleRecord&RN=25034664 |
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10.1117/12.2298489 |
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1653 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Hot-electron superconducting mixers |
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Conference Article |
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Year |
1993 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
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Volume |
2104 |
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329-330 |
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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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SPIE |
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Birch, J.R.; Parker, T.J. |
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18th International Conference on Infrared and Millimeter Waves |
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1654 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Hot electron superconductive mixers |
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Conference Article |
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Year |
1993 |
Publication |
Proc. 4th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 4th Int. Symp. Space Terahertz Technol. |
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618-622 |
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HEB mixers |
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no |
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1656 |
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Author |
Gol'tsman, G. N.; Elant'iev, A. I.; Karasik, B. S.; Gershenzon, E. M. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Antenna – coupled superconducting electron-heating bolometer |
Type |
Conference Article |
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Year |
1993 |
Publication |
Proc. 4th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 4th Int. Symp. Space Terahertz Technol. |
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623-628 |
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HEB |
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We propose a novel antenna-coupled superconducting bolometer based on electron-heating in the resistive state. A short narrow ultrathin super- conducting film strip (sized approximately 4x1x0.01 pm 3 ), which is in good thermal contact with the thermostat, serves as a resistive load for infrared or submillimeter current. In contrast to conventional isothermal super- conducting bolometers electron-heating ones can have a higher sensitivity which grows when filni. thickness is reduced. Response time of electron- heating bolometer does not depend on heat transfer from the film to the enviroment. To calculate the sensitivity (NEP), we have used experimental data on wideband Al, Nb and NbN bolometers which have the same un- derlying physical mechanism. The bolom.eters have been made in the form of a structure composed of a number of long narrow strips. The values of for Al, NEP have been found to be 1.5 . 113 -16 1 140 -15 ) and 2 . 10 – 14werT,-1/2 – Nb and NbN respectively. In the paper, the prospects are also discussed of improving the picosecond YBaCuO detector, developed recently. NEP value of the detector, if combined with a microantenna, can reach the order of 10- •ilz-v2. |
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1657 |
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Semenov, A. D.; Sergeev, A. V.; Kouminov, P.; Goghidze, I. G.; Heusinger, M. A.; Nebosis, R. S.; Gol'tsman, G. N.; Gershenzon, E. M.; Renk, K. F. |
![find book details (via ISBN) isbn](img/isbn.gif)
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Title |
Transparency of YBCO film/substrate interfaces for thermal phonons determined by photoresponse measurements |
Type |
Conference Article |
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Year |
1993 |
Publication |
Proc. 1st European Conf. on Appl. Supercond. |
Abbreviated Journal |
Proc. 1st European Conf. on Appl. Supercond. |
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2 |
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1443-1446 |
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YBCO HTS detectors |
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Direct measurements of the thermal boundary resistance were performed by means of the stationary method. In this approach the temperature of an electrically heated film is controlled by its dc resistance while an additional film on the same substrate is used as a thermometer monitoring substrate temperature. The temperature field in the substrate is then calculated to deduce the Kapitza temperature step at the interface between the heated strip and the substrate. The main statement of all afore-said papers is that experimental values of the thermal boundary resistance are too large to be explained by the acoustic mismatch model. In this paper we investigate transparency of YBaCuO film/substrate interfaces for thermal phonons by means of photoresponse measurements. We show that our data are in reasonable agreement with the acoustic mismatch theory. |
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Freyhardt, H. C. |
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3-88355-197-X |
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1st European conference on applied superconductivity |
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1661 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Heating of electrons in resistive state of superconducting films. Detectors, mixers and switches |
Type |
Conference Article |
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Year |
1992 |
Publication |
Progress in High Temperature Superconductivity |
Abbreviated Journal |
Progress in High Temperature Superconductivity |
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32 |
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190-195 |
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superconducting films, heating of electrons |
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International Conference on High Temperature Superconductivity and Localization Phenomena , Moscow, Russia , 11 – 15 May 1991 |
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Notes |
https://books.google.co.kr/books?hl=en&lr=&id=uCI0DwAAQBAJ&oi=fnd&pg=PA190&ots=z7WGjXYWr4&sig=TQ6G6dKsmcj4faYe1ZLw_BFmps8 |
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1666 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Gogidze, I. G.; Semenov, A. D.; Sergeev, A. V. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Processes of electron-phonon interaction in thin YBaCuO films |
Type |
Journal Article |
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Year |
1991 |
Publication |
Phys. C: Supercond. |
Abbreviated Journal |
Phys. C: Supercond. |
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185-189 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
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1371-1372 |
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YBCO HTS detectors |
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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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0921-4534 |
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1676 |
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Varyukhin, S. V.; Zakharov, A. A.; Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsyna, N. G.; Chulkova, G. M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
AC losses and submillimeter absorption in single crystals La2CuO4 |
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Journal Article |
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1990 |
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Phys. B Condens. Mat. |
Abbreviated Journal |
Phys. B Condens. Mat. |
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165-166 |
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1269-1270 |
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metal-dielectric-La2Cu04 |
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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. |
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1686 |
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