| Records |
| Author |
Semenov, A. D.; Goghidze, I. G.; Gol’tsman, G. N.; Sergeev, A. V.; Gershenzon, E. M. |
| Title |
Evidence for the spectral dependence of nonequilibrium picosecond photoresponse of YBaCuO thin films |
Type |
Journal Article |
| Year |
1993 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
63 |
Issue |
5 |
Pages |
681-683 |
| Keywords |
YBCO HTS detectors, nonequilibrium |
| Abstract |
The transient voltage photoresponse of current biased YBaCuO thin films to 20 ps laser pulses of 0.63 and 1.54 μm wavelengths is measured for temperatures around the superconducting transition region. The fast picosecond decay of the response is followed by a slow nanosecond relaxation which is associated with the bolometric effect. The magnitude of the fast component of the response varies in proportion to the square root of wavelength that plausibly reflects multiplication processes of photoexcited electrons via electron–electron scattering and interaction with high energy phonons. |
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| ISSN |
0003-6951 |
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no |
| Call Number |
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Serial |
1655 |
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| Author |
Nebosis, R. S.; Heusinger, M. A.; Schatz, W.; Renk, K. F.; Gol’tsman, G. N.; Karasik, B. S.; Semenov, A. D.; Gershenzon, E. M. |
| Title |
Ultrafast photoresponse of a structured YBa2Cu3O7-δ thin film to ultrashort FIR laser pulses |
Type |
Journal Article |
| Year |
1993 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
| Volume |
3 |
Issue |
1 |
Pages |
2160-2162 |
| Keywords |
YBCO HTS detectors |
| Abstract |
The authors have investigated the photoinduced voltage response of a current-carrying structured YBa2Cu3O7-δ thin film to ultrashort far-infrared (FIR) laser pulses in the frequency range from 0.7 THz to 7 THz. The detector has shown an almost constant sensitivity of 1 mV/W and a noise equivalent power of less than 5*10/sup -7/ W/ square root Hz. The temperature dependence of the decay time of the detector signal was studied for temperatures around the transition temperature of the film ( approximately 80 K). For a detector temperature where dR/dT had its maximum, the authors observed bolometric signals with decay times of about 2 ns, and for lower temperatures they observed nonbolometric signals with decay times of approximately 120 ps; the duration of the nonbolometric signals was limited by the time resolution of the electronic registration equipment. |
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no |
| Call Number |
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Serial |
1658 |
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| Author |
Semenov, A. D.; Goghidze, I. G.; Gol’tsman, G. N.; Sergeev, A. V.; Aksaev, E. E.; Gershenzon, E. M. |
| Title |
Non-equilibrium quasiparticle response to radiation and bolometric effect in YBaCuO films |
Type |
Journal Article |
| Year |
1993 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
| Volume |
3 |
Issue |
1 |
Pages |
2132-2135 |
| Keywords |
YBCO HTS HEB detectors |
| Abstract |
The voltage photoresponse of structured current biased YBCO films on different substrates to 20-ps laser pulses of 0.63- mu m and 1.54- mu m wavelengths and to continuously modulated radiation of 2-mm wavelength is measured to temperatures around Tc. Fast picosecond decay of the response to pulsed radiation is followed by slow exponential relaxation with a nanosecond characteristic time depending on the substrate material and film dimensions. The slow component does not depend on wavelength and is attributed to the bolometric effect, while the magnitude of the fast component associated with nonequilibrium response rises with wavelength. More than an order-of-magnitude increase of the nonequilibrium response is seen from near-infrared to millimeter-wave range. This dependence plausibly reflects the low efficiency of multiplication of photoexcited electrons in YBaCuO compared to conventional superconductors. |
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Edition |
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| ISSN |
1558-2515 |
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no |
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Serial |
1659 |
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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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| Language |
English |
Summary Language |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0146-9592 |
ISBN |
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| Notes |
PMID:19802049 |
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no |
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Serial |
1660 |
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| Author |
Semenov, A. D.; Sergeev, A. V.; Kouminov, P.; Goghidze, I. G.; Heusinger, M. A.; Nebosis, R. S.; Gol'tsman, G. N.; Gershenzon, E. M.; Renk, K. F. |
| Title |
Transparency of YBCO film/substrate interfaces for thermal phonons determined by photoresponse measurements |
Type |
Conference Article |
| Year |
1993 |
Publication |
Proc. 1st European Conf. on Appl. Supercond. |
Abbreviated Journal |
Proc. 1st European Conf. on Appl. Supercond. |
| Volume |
2 |
Issue |
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Pages |
1443-1446 |
| Keywords |
YBCO HTS detectors |
| Abstract |
Direct measurements of the thermal boundary resistance were performed by means of the stationary method. In this approach the temperature of an electrically heated film is controlled by its dc resistance while an additional film on the same substrate is used as a thermometer monitoring substrate temperature. The temperature field in the substrate is then calculated to deduce the Kapitza temperature step at the interface between the heated strip and the substrate. The main statement of all afore-said papers is that experimental values of the thermal boundary resistance are too large to be explained by the acoustic mismatch model. In this paper we investigate transparency of YBaCuO film/substrate interfaces for thermal phonons by means of photoresponse measurements. We show that our data are in reasonable agreement with the acoustic mismatch theory. |
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Editor |
Freyhardt, H. C. |
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ISBN |
3-88355-197-X |
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Conference |
1st European conference on applied superconductivity |
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no |
| Call Number |
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Serial |
1661 |
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| 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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Editor |
Meissner, M.; Pohl, R. O. |
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Seventh International Conference, Cornell University, Ithaca, New York, August 3-7, 1992 |
| Notes |
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Approved |
no |
| Call Number |
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Serial |
1662 |
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| Author |
Heusinger, M. A.; Nebosis,R. S.; Schatz, W.; Renk, K. F.; Gol’tsman, G. N.; Karasik, B. S.; Semenov, A. D.; Gershenzon, E. M. |
| Title |
Temperature dependence of bolometric and non-bolometric photoresponse of a structured YBa2Cu3O7-δ thin film |
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 |
193-195 |
| Keywords |
YBCO HTS detectors |
| Abstract |
We investigated the temperature dependence of the transient voltage photoresponse of a current biased structured YBa2Cu3O7−δ thin film in its transition temperature region, around 79 K. Both, picosecond nonbolometric and nanosecond bolometric response to ultrashort far-infrared laser pulses were found for frequencies between 25 cm−1 and 215 cm−1. We will discuss optimum conditions for radiation detection and present an analysis of the dynamical behaviour of excited high T c thin films. |
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Editor |
Meissner, M.; Pohl, R. O. |
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Seventh International Conference, Cornell University, Ithaca, New York, August 3-7, 1992 |
| Notes |
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no |
| Call Number |
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Serial |
1663 |
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| Author |
Sergeev, A. V.; Aksaev, E. E.; Gogidze, I. G.; Gol’tsman, G. N.; Semenov, A. D.; Gershenzon, E. M. |
| Title |
Thermal boundary resistance at YBaCuO film-substrate interface |
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 |
405-406 |
| Keywords |
YBCO films |
| Abstract |
The nanosecond voltage response of YBaCuo films on Al2O3, MgO and ZrO2 substrates to electromagnetic radiation of millimeter and visible ranges has been investigated. The analysis of experimental conditions for Al2O3 and MgO substrates shows that the resistance change is monitored by the Kapitza boundary shift of temperature during the temporal interval ~ 100 ns limited by the time of phonon return from a substrate into a film. The observed exponential voltage decay is described by the phonon escape time which is proportional to the film thickness and is weakly temperature dependent. |
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Editor |
Meissner, M.; Pohl, R. O. |
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Conference |
Seventh International Conference, Cornell University, Ithaca, New York, August 3-7, 1992 |
| Notes |
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no |
| Call Number |
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Serial |
1665 |
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| Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
| Title |
Heating of electrons in resistive state of superconducting films. Detectors, mixers and switches |
Type |
Conference Article |
| Year |
1992 |
Publication |
Progress in High Temperature Superconductivity |
Abbreviated Journal |
Progress in High Temperature Superconductivity |
| Volume |
32 |
Issue |
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Pages |
190-195 |
| Keywords |
superconducting films, heating of electrons |
| Abstract |
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International Conference on High Temperature Superconductivity and Localization Phenomena , Moscow, Russia , 11 – 15 May 1991 |
| Notes |
https://books.google.co.kr/books?hl=en&lr=&id=uCI0DwAAQBAJ&oi=fnd&pg=PA190&ots=z7WGjXYWr4&sig=TQ6G6dKsmcj4faYe1ZLw_BFmps8 |
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no |
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Serial |
1666 |
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| Author |
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. |
| Title |
Picosecond YBa2Cu3O7−δdetector for far‐infrared radiation |
Type |
Journal Article |
| Year |
1992 |
Publication |
J. Appl. Phys. |
Abbreviated Journal |
J. Appl. Phys. |
| Volume |
72 |
Issue |
11 |
Pages |
5496-5499 |
| Keywords |
YBCO HTS detectors |
| 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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Series Issue |
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Edition |
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| ISSN |
0021-8979 |
ISBN |
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Approved |
no |
| Call Number |
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Serial |
1668 |
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| Author |
Voronov, B. M.; Gershenzon, E. M.; Gol'tsman, G. N.; Gogidze, I. G.; Gusev, Yu. P.; Zorin, M. A.; Sejdman, L. A.; Semenov, A. D. |
| Title |
Picosecond range detector base on superconducting niobium nitride film sensitive to radiation in spectral range from millimeter waves up to visible light |
Type |
Journal Article |
| Year |
1992 |
Publication |
Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
Abbreviated Journal |
Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
| Volume |
5 |
Issue |
5 |
Pages |
955-960 |
| Keywords |
NbN HEB detectors |
| Abstract |
Fast-operating picosecond detector of electromagnetical radiation is developed on the basis of fine superconducting film of niobium nitride with high sensitivity within spectral range from millimetric waves up to visible light. Detector sensitive element represents structure covering narrow parallel strips with micron sizes included in the rupture of microstrip line. Detecting ability of the detector and time constant measured using amplitude-simulated radiation of reverse wave tubes and pulse radiation of picosecond gas and solid-body lasers, constitute D*≅1010 W-1·cm·Hz-1/2 and τ≤5 ps respectively, at 10 K temperature. The expected value of time constant of the detector at 10 K obtained via extrapolation of directly measured dependence that is, τ ∝ τ-1, constitutes 20 ps. Experimental data demonstrate that detection mechanism is linked with electron heating effect. |
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Russian |
Summary Language |
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Series Issue |
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Edition |
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| ISSN |
0131-5366 |
ISBN |
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no |
| Call Number |
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Serial |
1670 |
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| Author |
Lang, P. T.; Knott, W. J.; Leipold, I.; Renk, K. F.; Semenov, A. D.; Gol'tsman, G. N. |
| Title |
Generation and detection of tunable ultrashort infrared and far-infrared radiation pulses of high intensity |
Type |
Journal Article |
| Year |
1992 |
Publication |
Int. J. of Infrared and Millimeter Waves |
Abbreviated Journal |
Int. J. of Infrared and Millimeter Waves |
| Volume |
13 |
Issue |
3 |
Pages |
373-380 |
| Keywords |
CO2 IR lasers, FIR |
| Abstract |
We report on generation and detection of intense pulsed radiation with frequency tunability in the infrared and far-infrared spectral regions. Infrared radiation is generated with a transversally electrically excited high pressure CO2 laser. A laser pulse of a total duration of about 300 ns consisted, due to self mode locking, of a series of single pulses, some with pulse durations of less than 450 ps and peak powers larger than 20 MW. Using these pulses for optical with durations less than 400 ps were obtained. For detection a new ultrafast superconducting detector was used. |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
0195-9271 |
ISBN |
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Expedition |
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| Notes |
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Approved |
no |
| Call Number |
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Serial |
1671 |
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| Author |
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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Series Issue |
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Edition |
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| ISSN |
0003-6951 |
ISBN |
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Approved |
no |
| Call Number |
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Serial |
1672 |
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| Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Dzardanov, A. L.; Elant'ev, A. I.; Zorin, M. A.; Markin, A. G.; Semenov, A. D. |
| Title |
S-N switching of niobium and YBCO films: limit time and perspective of fast key element creation |
Type |
Journal Article |
| Year |
1992 |
Publication |
Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
Abbreviated Journal |
Sverkhprovodimost': Fizika, Khimiya, Tekhnika |
| Volume |
5 |
Issue |
12 |
Pages |
2386-2402 |
| Keywords |
YBCO HTS switches |
| Abstract |
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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Series Issue |
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Edition |
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| ISSN |
0131-5366 |
ISBN |
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Expedition |
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| Notes |
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Approved |
no |
| Call Number |
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Serial |
1674 |
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| Author |
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 |
|
Pages |
1371-1372 |
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YBCO HTS detectors |
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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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