Optical response of highly oriented YBCO thin films

A thin-film transition edge bolometer was fabricated from laser ablated YBCO. The response to chopped 633-nm radiation was measured as a function of temperature, optical intensity, bias current, and signal frequency. At a chopping frequency of 1 Hz and a bias current of 100 mu A, the responsivity wa...

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Veröffentlicht in:	IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) 1991-03, Vol.27 (2), p.2828-2831
1. Verfasser:	Eidelloth, W.
Format:	Artikel
Sprache:	eng
Schlagworte:	440500 > Thermal Instrumentation-- (1990-) ALKALINE EARTH METAL COMPOUNDS Applied sciences BARIUM COMPOUNDS BARIUM OXIDES BOLOMETERS CHALCOGENIDES CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY COPPER COMPOUNDS COPPER OXIDES CRYSTAL STRUCTURE Current measurement Electronics Exact sciences and technology FABRICATION Frequency FREQUENCY DEPENDENCE FUNCTIONS GRAIN ORIENTATION Laser noise Laser transitions LASER-PRODUCED PLASMA MEASURING INSTRUMENTS MICROSTRUCTURE Optical films Optical noise OPTICAL PROPERTIES Optical vortices ORIENTATION OTHER INSTRUMENTATION OXIDES OXYGEN COMPOUNDS PHYSICAL PROPERTIES PLASMA RESPONSE FUNCTIONS Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Superconducting devices SUPERCONDUCTING FILMS TEMPERATURE DEPENDENCE Transistors TRANSITION ELEMENT COMPOUNDS VORTICES Yttrium barium copper oxide YTTRIUM COMPOUNDS 665412 > Superconducting Devices-- (1992-) YTTRIUM OXIDES
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Beschreibung
Zusammenfassung:	A thin-film transition edge bolometer was fabricated from laser ablated YBCO. The response to chopped 633-nm radiation was measured as a function of temperature, optical intensity, bias current, and signal frequency. At a chopping frequency of 1 Hz and a bias current of 100 mu A, the responsivity was 10 V/W and the noise power was 39 nW/ square root Hz. At low frequencies the device showed all the characteristics of a bolometer. At higher frequencies, however, an additional component of the photo response was found. The magnitude of this component scales roughly like f/sup -0.5/. This additional response is thought to be caused by optically induced depinning of vortices.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/20.133798