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Nebosis, R. S.; Steinke, R.; Lang, P. T.; Schatz, W.; Heusinger, M. A.; Renk, K. F.; Gol’tsman, G. N.; Karasik, B. S.; Semenov, A. D.; Gershenzon, E. M. |
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Title |
Picosecond YBa2Cu3O7−δdetector for far‐infrared radiation |
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Journal Article |
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Year |
1992 |
Publication |
J. Appl. Phys. |
Abbreviated Journal |
J. Appl. Phys. |
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Volume |
72 |
Issue |
11 |
Pages  |
5496-5499 |
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Keywords |
YBCO HTS detectors |
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Abstract |
We report on a picosecond YBa2Cu3O7−δ detector for far‐infrared radiation. The detector, consisting of a current carrying structure 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 25 to 215 cm−1. We found that the sensitivity (1 mV/W) was almost constant in this frequency range. We estimated a noise equivalent power of less than 5×10−7 W Hz−1/2. Taking into account the results of a mixing experiment (in the frequency range from 4 to 30 cm−1) we suggest that the response time of the detector was few picoseconds. |
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0021-8979 |
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1668 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Dzardanov, A. L.; Elant'ev, A. I.; Zorin, M. A.; Markin, A. G.; Semenov, A. D. |
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Title |
S-N switching of niobium and YBCO films: limit time and perspective of fast key element creation |
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Journal Article |
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Year |
1992 |
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Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
Abbreviated Journal |
Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
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Volume |
5 |
Issue |
12 |
Pages |
2386-2402 |
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Keywords |
YBCO HTS switches |
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A study was made on processes of switching of thin niobium film strips between superconducting and normal states under the effect of optical radiation pulse and voltage step. The results are described satisfactorily by the model of spatial homogeneous electron heating. It is shown that limiting switching times can be equal to several shares of nanosecond at 4.2 K. Preliminary results for YBa2Cu3O-7-x films are presented. Prospects and advantages of creation of ducting structures of narrow streps, are discussed. |
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0131-5366 |
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1674 |
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Gershenzon, E.M.; Gol'tsman, G.N.; Dzardanov, A.L.; Kuznetsov, E.A. |
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Title |
Superconducting UHF-limiter based on electron heating up |
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Journal Article |
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1992 |
Publication |
Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
Abbreviated Journal |
Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
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5 |
Issue |
11 |
Pages |
2164-2170 |
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Keywords |
electron heating, applications |
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The results of experimental investigation of fast-action 5HF-limiter are presented; the limiter is based on the utilization of electron hetaing phenomenon in thin superconducting films. The design of SHF-limiter, which is intended for operation at liquid helium temperatures and which has the form of a section of superconducting NbN microstrip line for 1-12 GHz rang, is described. |
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Russian |
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0235-8964 |
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1669 |
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Budyanskij, M. Ya.; Sejdman, L. A.; Voronov, B. M.; Gubkina, T. O. |
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Title |
Increase of reproducibility in production of superconducting thin films of niobium nitride |
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Journal Article |
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Year |
1992 |
Publication |
Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
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Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
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5 |
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10 |
Pages |
1950-1954 |
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Keywords |
NbN films |
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Technique to control the composition of gas medium in the reactive magnetron discharge and the composition of the deposited films of niobium nitride using electrical parameters of discharge only, in particular, by δU = Up – Uar value at contant stabilized discharge current is described. Technique to select optimal condition for deposition of niobium nitride films when the films have composition meeting chemical formula, is suggested. Thin films of niobium nitride with up to 7 nm thickness and with rather high temperature of transition into superconducting state Tk > 10 K) and with low width of transition (δ < 0.6 K), are obtained. It is determined, that substrate material and dielectric sublayer do not affect. Tk value, while difference in coefficients of thermal expansion of substrate and of film affects δTk value. |
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0131-5366 |
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1675 |
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Author |
Crowe, T. W.; Mattauch, R. J.; Roser, H. P.; Bishop, W. L.; Peatman, W. C. B.; Liu, X. |
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Title |
GaAs Schottky diodes for THz mixing applications |
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Year |
1992 |
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Proc. IEEE |
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80 |
Issue |
11 |
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1827-1841 |
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