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Tonguz, O.K.; Hwang, B. |
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Title |
Noise performance of AFC loops in optical heterodyne receivers |
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Conference Article |
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Year |
1993 |
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Proc. Lasers and Electro-Optics Society Annual Meeting |
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Proc. LEOS |
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361-362 |
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Keywords |
optical mixing |
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San Jose, CA, USA |
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510 |
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Author |
Maas, S. |
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Title |
SIS mixers |
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Conference Article |
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Year |
1993 |
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Artech House |
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338-340 |
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Boston, MA |
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249 |
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Author |
Gershenzon, E. M.; Gol'tsman, G. N. |
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Title |
Hot-electron superconducting mixers |
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Conference Article |
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Year |
1993 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
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Volume |
2104 |
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Pages |
329-330 |
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Abstract |
The creation of low noise heterodyne receivers for frequencies above 1 THz is in the urgentneed for radio astronomy, laser spectroscopy, plasma diagnostic, etc. In this paper we discussthe nonlinear effect related to hot electrons in superconductors, and their potential use in lownoise submilimeter wave mixer. We also discuss results achieved so far as well as possible futuredevelopments. |
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SPIE |
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Birch, J.R.; Parker, T.J. |
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18th International Conference on Infrared and Millimeter Waves |
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no |
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1654 |
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Author |
Sergeev, A. V.; Livanov, D. V. |
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Title |
Phonon renormalization of thermoelectric power of high-Tc materials |
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Conference Article |
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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 |
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112 |
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204-205 |
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Keywords |
HTS, YBCO |
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Renormalization of thermoelectric power due to Nielsen — Taylor effect (interference between electron-phonon and electron- impurity interactions) is used for the explanation of the temperature dependence and sign of the thermopower in high-Tc materials. In the framework of the model the negative sign of TEP of untwinned YBa2Cu3O7−x crystal in a-direction observed by Howson et. al. is connected to the strong hole scattering via O-vacancies in chains. |
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Meissner, M.; Pohl, R. O. |
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Seventh International Conference, Cornell University, Ithaca, New York, August 3-7, 1992 |
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1664 |
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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. |
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Title |
Temperature dependence of bolometric and non-bolometric photoresponse of a structured YBa2Cu3O7-δ thin film |
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Conference Article |
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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 |
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Volume |
112 |
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193-195 |
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Keywords |
YBCO HTS detectors |
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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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Meissner, M.; Pohl, R. O. |
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Seventh International Conference, Cornell University, Ithaca, New York, August 3-7, 1992 |
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1663 |
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