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Gershenzon, E. M.; Goltsman, G. N. |
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Title  |
Zeeman effect in excited-states of donors in germanium |
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1972 |
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Sov. Phys. Semicond. |
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Sov. Phys. Semicond. |
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6 |
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3 |
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509 |
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Ge, donors, Zeeman effect |
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Amer Inst Physics 1305 Walt Whitman Rd, Ste 300, Melville, Ny 11747-4501 Usa |
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1737 |
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Cherednichenko, S.; Ronnung, F.; Gol'tsman, G.; Gershenzon, E.; Winkler, D. |
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Title |
YBa2Cu3O7-δ hot-electron bolometer with submicron dimensions |
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Conference Article |
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1999 |
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Proc. 10th Int. Symp. Space Terahertz Technol. |
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Proc. 10th Int. Symp. Space Terahertz Technol. |
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181-189 |
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YBCO HTS HEB mixers |
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Photoresponse of YBa2Cu3O7-δ hot-electron bolometers to modulated near-infrared radiation was studied at a modulation .frequenc y var y ing from 0.2 MHz to 2 GHz. Bolometers were _fabricated from a 50 12 M thick film and had in-plane areas of 10x10 , um 2 . 2x0.2 s um', 1x0.2 p.m', and 0.5x0.2 jim. We found that nonequilibrium phonons cool down more effectively for the bolometers with smaller area. For the smallest bolometer the bolometric component in the response is 10 dB less than for the largest one. |
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1572 |
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Gershenzon, E. M.; Gershenzon, M. E.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
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Title |
Wide-band highspeed Nb and YBaCuO detectors |
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Journal Article |
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1991 |
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IEEE Trans. Magn. |
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IEEE Trans. Magn. |
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27 |
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2 |
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2836-2839 |
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YBCO, HTS, Nb detectors |
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The physical limitations on the response time and the nature of nonequilibrium detection of radiation were investigated for Nb and YBCO film in a wide spectral range from millimeter to near-infrared wavelengths. In the case of ideal heat removal from the film, the detection mechanism is connected with an electron heating effect which is not selective over a wide spectral interval. For Nb, the dependence of the response time on the electron mean free path l and temperature T is tau varies as T/sup -2/l/sup -1/. The values of detectivity D* and tau are 3*10/sup 11/ W/sup -1/ Hz/sup 1/2/ cm and 5*10/sup -9/ s at T=1.6 K, respectively. For YBCO film the tau value of 1-2 ps at T=77 K was obtained; the NEP value of 3*10/sup -11/ W-Hz/sup -1/2/ can be obtained at T=77 K in the case of the optimal film matching to the radiation. |
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0018-9464 |
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239 |
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Gershenzon, E. M.; Gol’tsman, G. N.; Dzardanov, A. L.; Zorin, M. A. |
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Title |
Ultrafast superconductive switch |
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Journal Article |
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1991 |
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IEEE Trans. Magn. |
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IEEE Trans. Magn. |
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27 |
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2 |
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2844-2846 |
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Nb superconducting switch |
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The transition from superconductive to resistive state caused by infrared radiation and bias current pulses was investigated in order to minimize switching time tau and driving power W. Experimental results for Nb microstrips confirm the correctness of calculations based on the model of electron heating. For Nb switches, tau measured directly is 0.3-0.8 ns for radiation pulses and 1-3 ns for bias current pulses at T=4.2 K, while for YBaCuO switches at T=77 K it is expected to be several picoseconds. For an YBaCuO sample with the dimensions of 5*2*0.15 mu m/sup 2/, W was 10 mW, and it can be further reduced to the order of several microwatts by decreasing the volume of the sample. |
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1941-0069 |
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1680 |
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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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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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