Optical response of epitaxial and granular films of YBa/sub 2/Cu/sub 3/O/sub 7-delta/ at temperatures from 25 K to 100 K

Conference · Wed Mar 01 04:00:00 EST 1989 · IEEE Trans. Magn.; (United States)

OSTI ID:5919644

Forrester, M G; Gottlieb, M; Gavaler, J R; Braginski, A I

The authors present the results of measurements of optical detection in epitaxial and granular films of YBa/sub 2/Cu/sub 3/O/sub 7-delta/, at wavelengths of 0.63, 3.39, and 10.6 ..mu..m, at temperatures from 25 K to 100 K. Both types of film exhibit only bolometric detection, with no evidence for nonequilibrium effects in this temperature range. For 0.63 ..mu..m radiation, mechanically chopped at 725 Hz, measurements of a 10 x 90 ..mu..m epitaxial bridge yield a bolometric responsivity of approximately 5 x 10/sup 3/ V/W, and a detectivity D* of more than 10/sup 8/ cm..sqrt..Hz/W. Granular films biased above their critical current are found to exhibit two-level switching noise, resulting in Lorentzian deviations from an otherwise l/f noise spectrum.

• Research Organization: Westinghouse Research and Development Center, Pittsburgh, PA (US)
• OSTI ID: 5919644
• Report Number(s): CONF-880812-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
EPITAXY
FILMS
NOISE POLLUTION
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION
SUPERCONDUCTING FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES