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	Author	Gershenzon, E. M.; Gol'tsman, G. N.; Semenov, A. D.; Sergeev, A. V.
	Title	Mechanism of picosecond response of granular YBaCuO films to electromagnetic radiation			Type	Journal Article
	Year	1990	Publication	Solid State Communications	Abbreviated Journal	Solid State Communications
	Volume	76	Issue	4	Pages	493-497
	Keywords	YBCO HTS detectors
	Abstract	The ultrafast mechanisms of radiation detection in granular YBaCuO films are studied in the wide wavelength range from millimeter to near infrared. With the rise of radiation frequency the Josephson detection at the grain boundary weak links is replaced by electron heating into the grains. This change occurs in the submillimeter wavelength range. Electron-phonon relaxation time τeph is determined by direct measurements and analyses quasistationary electron heating. Temperature dependence of τeph at T ≤ 40 K was found to be τeph ∼ T−1. The results show that detectors with the response time of few picoseconds at nitrogen temperature are attainable.
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	Series Volume		Series Issue		Edition
	ISSN	0038-1098	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	no
	Call Number				Serial	1685
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