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Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
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Title |
Mechanism of picosecond response of granular YBaCuO films to electromagnetic radiation |
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Journal Article |
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Year |
1990 |
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Solid State Communications |
Abbreviated Journal |
Solid State Communications |
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Volume |
76 |
Issue |
4 |
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493-497 |
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Keywords |
YBCO HTS detectors |
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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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0038-1098 |
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1685 |
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Aksaev, E. E.; Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
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Title |
Interaction of electrons with thermal phonons in YBa2Cu3O7-δ films at low temperatures |
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Journal Article |
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1989 |
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JETP Lett. |
Abbreviated Journal |
JETP Lett. |
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50 |
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5 |
Pages |
283-286 |
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Keywords |
YBCO HTS films |
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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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1690 |
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Gershenzon, E. M.; Gol’tsman, G. N.; Sergeev, A.; Semenov, A. D. |
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Title |
Picosecond response of YBaCuO films to electromagnetic radiation |
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Conference Article |
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Year |
1990 |
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Proc. European Conf. High-Tc Thin Films and Single Crystals |
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Proc. European Conf. High-Tc Thin Films and Single Crystals |
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457-462 |
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Keywords |
YBCO HTS detectors |
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Radiation-induced change of the resistance was studied in the resistive state of YBaCuO films. Electron-phonon relaxation time T h was determmed from direct ep measurements and analysis of quasistationary electron heating. Temperature dependence of That TS 40 K was found to – ep be T h.. T'. The resul ts show that ep detectors with the response time of few picosecond at nitrogen temperature can be realized. |
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Gorzkowski, W.; Gutowski, M.; Reich, A.; Szymczak, H. |
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European Conference , Ustroń, Poland , 30 Sept – 4 Oct 1989 |
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1695 |
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Gershenzon, E. M.; Gershenson, M. E.; Goltsman, G. N.; Lyulkin, A. M.; Semenov, A. D.; Sergeev, A. V. |
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Title |
Limiting characteristics of fast-response superconducting bolometers |
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1989 |
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Zhurnal Tekhnicheskoi Fiziki |
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Zhurnal Tekhnicheskoi Fiziki |
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59 |
Issue |
2 |
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11-120 |
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HEB |
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Теоретически и экспериментально исследовано физическое ограничение быстродействия сверхпроводящего болометра. Показано, что минимальная постоянная времени реализуется в условиях электронного разогрева и определяется процессом неупругого электрон-фонон-ного взаимодействия. Сформулированы требования к конструкции «электронного болометра» для достижения предельной чувствительности. Проведено сравнение характеристик электронного болометра и обычных болометров различных типов. |
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1696 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Karasik, B. S.; Semenov, A. D. |
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Title |
Measurement of the energy gap in the compound YBaCu3O9-δ on the basis of the IR absorption spectrum |
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Year |
1987 |
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JETP Lett. |
Abbreviated Journal |
JETP Lett. |
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Volume |
46 |
Issue |
5 |
Pages |
237-238 |
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Keywords |
YBCO HTS detectors |
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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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1703 |
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