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Gousev, Y. P.; Semenov, A. D.; Gol'tsman, G. N.; Sergeev, A. V.; Gershenzon, E. M. |
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Title |
Electron-phonon interaction in disordered NbN films |
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1994 |
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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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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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0921-4526 |
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1649 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N. |
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Title |
Hot-electron superconducting mixers |
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Conference Article |
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Year |
1993 |
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Proc. SPIE |
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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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Gershenzon, E. M.; Gol'tsman, G. N. |
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Title |
Hot electron superconductive mixers |
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Conference Article |
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Year |
1993 |
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Proc. 4th Int. Symp. Space Terahertz Technol. |
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Proc. 4th Int. Symp. Space Terahertz Technol. |
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618-622 |
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HEB mixers |
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1656 |
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Gol'tsman, G. N.; Elant'iev, A. I.; Karasik, B. S.; Gershenzon, E. M. |
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Title |
Antenna – coupled superconducting electron-heating bolometer |
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Conference Article |
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1993 |
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Proc. 4th Int. Symp. Space Terahertz Technol. |
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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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Nebosis, R. S.; Heusinger, M. A.; Semenov, A. D.; Lang, P. T.; Schatz, W.; Steinke, R.; Renk, K. F.; Gol'tsman, G. N.; Karasik, B. S.; Gershenzon, E. M. |
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Title |
Ultrafast photoresponse of an YBa2Cu3O7-δ film to far-infrared radiation pulses |
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Journal Article |
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Year |
1993 |
Publication |
Opt. Lett. |
Abbreviated Journal |
Opt. Lett. |
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18 |
Issue |
2 |
Pages |
96-97 |
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Keywords |
YBCO HTS detectors |
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Abstract |
We report the observation of an ultrafast photoresponse of a high-T(c), film to far-infrared radiation pulses. The response of a sample, consisting of a current-carrying structured YBa(2)Cu(3)O(7-delta) film cooled to liquid-nitrogen temperature, was studied by use of ultrashort laser pulses from an optically pumped far-infrared laser in the frequency range from 0.7 to 7 THz. We found that the response time was limited by the time resolution, 120 ps, of our electronic registration equipment. |
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English |
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0146-9592 |
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PMID:19802049 |
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1660 |
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