| Records |
| Author |
Gershenzon, E. M.; Gol’tsman, G. N.; Dzardanov, A. L.; Zorin, M. A. |
| Title |
Ultrafast superconductive switch |
Type |
Journal Article |
| Year |
1991 |
Publication |
IEEE Trans. Magn. |
Abbreviated Journal |
IEEE Trans. Magn. |
Volume  |
27 |
Issue |
2 |
Pages |
2844-2846 |
| Keywords |
Nb superconducting switch |
| Abstract |
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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| ISSN |
1941-0069 |
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no |
| Call Number |
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Serial |
1680 |
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| Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D. |
| Title |
Submillimeter backward wave tube spectrometer for measuring superconducting film transmission |
Type |
Journal Article |
| Year |
1983 |
Publication |
Pribory i Tekhnika Eksperimenta |
Abbreviated Journal |
Pribory i Tekhnika Eksperimenta |
| Volume |
26 |
Issue |
5 |
Pages |
134-137 |
| Keywords |
BWO spectroscopy, spectrometer, transmission |
| Abstract |
A spectrometer employing six backward wave tubes is described. It is intended for investigation of superconductors in the 0.2-3 mm range of wave lengths. During the measurement of the transmission spectrum it is possible to determine the energy gap for superconduct1ng films 50 to 4000 A thick. The transmission factor can vary from 10-1 to 10-9. Spectrum of relation of film transmission factors in superconducting and normal states is measured for determining the energy gap 2 Δ. The transmission spectrum obtained by means of a computer for vanadium film 300 A thick is given as an example. The energy gap 2 Δ = 1.4 MeV |
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Russian |
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0032-8162 |
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Субмиллиметровый спектрометр с лампами обратной волны для измерения пропускания сверхпроводниковых пленок |
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no |
| Call Number |
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Serial |
1713 |
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| Author |
Gershenzon, E.M.; Gol'tsman, G.N.; Ptitsyna, N. G. |
| Title |
Carrier lifetime in excited states of shallow impurities in germanium |
Type |
Journal Article |
| Year |
1977 |
Publication |
JETP Lett. |
Abbreviated Journal |
JETP Lett. |
| Volume |
25 |
Issue |
12 |
Pages |
539-543 |
| Keywords |
Ge, shallow impurities, excited states |
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no |
| Call Number |
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Serial |
1726 |
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| Author |
Gershenzon, E. M.; Orlova, S. L.; Orlov, L. A.; Ptitsina, N. G.; Rabinovich, R. I. |
| Title |
Intervalley cyclotron-impurity resonance of electrons in n-Ge |
Type |
Journal Article |
| Year |
1976 |
Publication |
JETP Lett. |
Abbreviated Journal |
JETP Lett. |
| Volume |
24 |
Issue |
3 |
Pages |
125-128 |
| Keywords |
n-Ge, cyclotron-impurity resonance |
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no |
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Serial |
1730 |
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| Author |
Men’shchikov, E. M.; Gogidze, I. G.; Sergeev, A. V.; Elant’ev, A. I.; Kuminov, P. B.; Gol’tsman, G. N.; Gershenzon, E. M. |
| Title |
Superconducting fast detector based on the nonequilibrium inductance response of a film of niobium nitride |
Type |
Journal Article |
| Year |
1997 |
Publication |
Tech. Phys. Lett. |
Abbreviated Journal |
Tech. Phys. Lett. |
| Volume |
23 |
Issue |
6 |
Pages |
486-488 |
| Keywords |
NbN KID |
| Abstract |
A new type of fast detector is proposed, whose operation is based on the variation of the kinetic inductance of a superconducting film caused by nonequilibrium quasiparticles created by the electromagnetic radiation. The speed of the detector is determined by the rate of multiplication of photo-excited quasiparticles, and is nearly independent of the temperature, being less than 1 ps for NbN. Models based on the Owen-Scalapino scheme give a good description of the experimentally determined dependence of the power-voltage sensitivity of the detector on the modulation frequency. The lifetime of the quasiparticles is determined, and it is shown that the reabsorption of nonequilibrium phonons by the condensate has a substantial effect even in ultrathin NbN films 5 nm thick, and results in the maximum possible quantum yield. A low concentration of equilibrium quasiparticles and a high quantum yield result in a detectivity D*=1012 W−1·Hz1/2 at a temperature T=4.2 K and D*=1016 W−1·cm· Hz1/2 at T=1.6 K. |
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Edition |
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| ISSN |
1063-7850 |
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no |
| Call Number |
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Serial |
1593 |
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| Author |
Voevodin, E. I.; Gershenzon, E. M.; Goltsman, G. N.; Ptitsina, N. G. |
| Title |
Energy-spectrum of shallow acceptors in Ge deformed strongly by a uniaxial pressure |
Type |
Journal Article |
| Year |
1989 |
Publication |
Sov. Phys. and Technics of Semiconductors |
Abbreviated Journal |
Sov. Phys. and Technics of Semiconductors |
| Volume |
23 |
Issue |
8 |
Pages |
843-846 |
| Keywords |
Ge, crystallography |
| Abstract |
Проведены исследования спектров фототермической ионизации мелких акцепторов (В, Аl) в Ge, предельно сжатом вдоль кристаллографической оси [100]. Из данных измерений с учетом теории построен энергетический спектр примесей. Показано, что энергии большого числа уровней четных и нечетных состояний хорошо соответствуют расчету, выполненному для примесей в анизотропном полупроводнике с параметром анизотропии γ=m∗⊥/m∗∥>1. |
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| Notes |
Энергетический спектр мелких акцепторов в сильно одноосно деформированном Ge |
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no |
| Call Number |
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Serial |
1692 |
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| Author |
Voevodin, E. I.; Gershenzon, E. M.; Goltsman, G. N.; Ptitsina, N. G.; Chulkova, G. M. |
| Title |
Capture of free holes by charged acceptors in uniaxially deformed Ge |
Type |
Journal Article |
| Year |
1988 |
Publication |
Fizika i Tekhnika Poluprovodnikov |
Abbreviated Journal |
Fizika i Tekhnika Poluprovodnikov |
| Volume |
22 |
Issue |
3 |
Pages |
540-543 |
| Keywords |
Ge, free holes, capture |
| Abstract |
Цель настоящей работы — исследование кинетики примесной фотопроводимости p-Ge при сильном одноосном сжатии в широком диапазоне изменения интенсивности примесного подсвета, создающего свободные дырки, и определение сечения каскадного захвата дырок на мелкие заряженные акцепторы в условиях преобладания электрон-фононного механизма потерь энергии. |
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Russian |
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| Notes |
Захват свободных дырок заряженными акцепторами в одноосно деформированном Ge |
Approved |
no |
| Call Number |
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Serial |
1698 |
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| Author |
Gershenzon, E. M.; Orlov, L. A.; Ptitsina, N. G. |
| Title |
Absorption spectra in electron transitions between excited states of impurities in germanium |
Type |
Journal Article |
| Year |
1975 |
Publication |
JETP Lett. |
Abbreviated Journal |
JETP Lett. |
| Volume |
22 |
Issue |
4 |
Pages |
95-97 |
| Keywords |
Ge, impurities, excited states, absorption spectra |
| Abstract |
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no |
| Call Number |
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Serial |
1773 |
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| Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Kagane, M. L. |
| Title |
Observation of free carrier resonances in p-type germanium at submillimeter wavelengths |
Type |
Journal Article |
| Year |
1978 |
Publication |
Sov. Phys. Solid State |
Abbreviated Journal |
Sov. Phys. Solid State |
| Volume |
20 |
Issue |
4 |
Pages |
573-579 |
| Keywords |
p-Ge, free carriers, resonances |
| Abstract |
The spectrum of hole resonances in pure p-Ge for submillimetre in quantizing magnetic fields has been studied and identified. Measurements of photoconductivity spectra of p-Ge were made in the wave range lambda = 2-0.3 mm at temp. of 4.2-15 deg K in magnetic fields H up to 40 Measurements at various frequencies showed that the position of a series of characteristic resonances depends on the frequency of the illumination. This is in line with theoretical conclusions about the effective mass of the carriers increasing with rise in the magnetic field as a result of the interaction of the edge of the valency band with the split spin-orbital interaction of the sub 7 exp + band and the conduction band. The relative intensity of the quantum resonance lines of the free holes depends on the excitation conditions. |
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no |
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Serial |
1721 |
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| Author |
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. |
| Title |
Ultrafast photoresponse of an YBa2Cu3O7-δ film to far-infrared radiation pulses |
Type |
Journal Article |
| Year |
1993 |
Publication |
Opt. Lett. |
Abbreviated Journal |
Opt. Lett. |
| Volume |
18 |
Issue |
2 |
Pages |
96-97 |
| Keywords |
YBCO HTS detectors |
| 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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Edition |
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| ISSN |
0146-9592 |
ISBN |
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| Notes |
PMID:19802049 |
Approved |
no |
| Call Number |
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Serial |
1660 |
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| Author |
Gershenzon, E. M.; Gol'tsman, G.; Ptitsina, N. G. |
| Title |
Energy spectrum of free excitons in germanium |
Type |
Journal Article |
| Year |
1973 |
Publication |
JETP Lett. |
Abbreviated Journal |
JETP Lett. |
| Volume |
18 |
Issue |
3 |
Pages |
93 |
| Keywords |
Ge, free excitons, energy spectrum |
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no |
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Serial |
1734 |
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| Author |
Gousev, Y. P.; Gol'tsman, G. N.; Karasik, B. S.; Gershenzon, E. M.; Semenov, A. D.; Barowski, H. S.; Nebosis, R. S.; Renk, K. F. |
| Title |
Quasioptical superconducting hot electron bolometer for submillmeter waves |
Type |
Journal Article |
| Year |
1996 |
Publication |
Int. J. of Infrared and Millimeter Waves |
Abbreviated Journal |
Int. J. of Infrared and Millimeter Waves |
| Volume |
17 |
Issue |
2 |
Pages |
317-331 |
| Keywords |
NbN HEB |
| Abstract |
We report on a superconducting hot electron bolometer coupled to radiation via a broadband antenna. The bolometer, a structured NbN film, was patterned on a thin dielectric membrane between terminals of a gold slotline antenna. We investigated the response to submillimeter radiation (wave-lengths ∼ 0.1 mm to 0.7 mm) in the fundamental Gaussian mode. We found that the directivity of the antenna was constant within a factor of 2.5 through the whole experimental range. The noise equivalent power of the bolometer at 119 µm was ∼ 3 · 10−13 W/Hz1/2; a time constant of ∼ 160 ps was estimated. |
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| ISSN |
0195-9271 |
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no |
| Call Number |
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Serial |
1618 |
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| Author |
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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no |
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Serial |
1684 |
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| Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G. |
| Title |
Observation of the free-exciton spectrum at submillimeter wavelengths |
Type |
Journal Article |
| Year |
1972 |
Publication |
JETP Lett. |
Abbreviated Journal |
JETP Lett. |
| Volume |
16 |
Issue |
4 |
Pages |
161-162 |
| Keywords |
Ge, energy spectrum, free excitons |
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no |
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Serial |
1736 |
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| Author |
Gershenzon, E. M.; Goltsman, G.; Orlova, S.; Ptitsina, N.; Gurvich, Y. |
| Title |
Germanium hot-electron narrow-band detector |
Type |
Journal Article |
| Year |
1971 |
Publication |
Sov. Radio Engineering And Electronic Physics |
Abbreviated Journal |
Sov. Radio Engineering And Electronic Physics |
| Volume |
16 |
Issue |
8 |
Pages |
1346 |
| Keywords |
Ge HEB detectors |
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Scripps Clinic Res Foundation 476 Prospect St, La Jolla, Ca 92037 |
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no |
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Serial |
1741 |
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