| Records |
| Author |
Gol’tsman, G. N.; Semenov, A. D.; Sergeev, A. V.; Aksaev, E. E.; Gogidze, I. G.; Gershenzon, E. M. |
| Title |
Electron-phonon interaction in thin YBaCuO films and fast detectors |
Type |
Conference Article |
| Year |
1993 |
Publication |
Phonon Scattering in Condensed Matter VII. Springer Series in Solid-State Sciences |
Abbreviated Journal |
Phonon Scattering in Condensed Matter VII. Springer Series in Solid-State Sciences |
| Volume |
112 |
Issue |
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Pages |
184-185 |
Keywords  |
YBCO HTS detectors |
| Abstract |
The thin. YBaCuO film response to laser and submillimeter radiation demonstrates the picosecond nonequilibrium peak on the nanosecond bolometric background. Experimental data give an evidence for the spectral dependence of picosecond photoresponse probably due to a poor efficiency of electron multiplication processes. Presented results prove an availability of fast YBaCuO thin film detector. |
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Meissner, M.; Pohl, R. O. |
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Seventh International Conference, Cornell University, Ithaca, New York, August 3-7, 1992 |
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1662 |
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Semenov, A. D.; Gol’tsman, G. N.; Gogidze, I. G.; Sergeev, A. V.; Gershenzon, E. M.; Lang, P. T.; Renk, K. F. |
| Title |
Subnanosecond photoresponse of a YBaCuO thin film to infrared and visible radiation by quasiparticle induced suppression of superconductivity |
Type |
Journal Article |
| Year |
1992 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
60 |
Issue |
7 |
Pages |
903-905 |
| Keywords |
YBCO HTS detectors |
| Abstract |
We observed subnanosecond photoresponse of a structured superconducting YBa2Cu3O7−δ thin film to infrared and visible radiation. We measured the voltage response of a current biased film (thickness 700 Å) in a resistive state to radiation pulses. From our results we conclude a response time of about 90 ps and a responsivity of about 4×1010 Ω/J. We attribute the response to Cooper pair breaking and suppression of the superconducting energy gap induced by nonequilibrium quasiparticles. |
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0003-6951 |
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1672 |
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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 |
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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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0921-4534 |
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1676 |
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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 |
1991 |
Publication |
IEEE Trans. Magn. |
Abbreviated Journal |
IEEE Trans. Magn. |
| Volume |
27 |
Issue |
2 |
Pages |
1321-1324 |
| Keywords |
YBCO HTS detectors |
| Abstract |
Ultrafast mechanisms of radiation detection in granular YBaCuO films are studied in the wide wavelength range from millimeter waves to near infrared. With an increase in 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. The electron-phonon relaxation time tau /sub eph/ is determined from direct measurements, quasi-stationary electron heating measurements, and the frequency dependence of the current at which maximum voltage shift is observed. The temperature dependence of tau /sub eph/ at T<or=40 K was found to be tau /sub eph/ approximately T/sup -1/. The results show that detectors with a response time of a few picoseconds at nitrogen temperature are attainable. |
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1941-0069 |
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no |
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1679 |
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Gershenzon, E. M.; Gogidze, I. G.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
| Title |
Picosecond response on optical-range emission in thin YBaCuO films |
Type |
Journal Article |
| Year |
1991 |
Publication |
Pisma v Zhurnal Tekhnicheskoi Fiziki |
Abbreviated Journal |
Pisma v Zhurnal Tekhnicheskoi Fiziki |
| Volume |
17 |
Issue |
22 |
Pages |
6-10 |
| Keywords |
YBCO HTS detectors |
| Abstract |
Целью настоящей работы является целенаправленный поиск пико-секундного отклика на оптическое излучение выяснение оптимальных условий его наблюдения, а также сравнение характеристик неравновесных эффектов в оптическом и субмиллиметровом диапазонах. |
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Russian |
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1684 |
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