Optical detector using superconducting BaPb/sub 0. 7/Bi/sub 0. 3/O/sub 3/ thin films

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.336720· OSTI ID:6010408

Enomoto, Y; Murakami, T

This paper describes a highly sensitive optical detector using a perovskite-type superconductor, BaPb/sub 0.7/Bi/sub 0.3/O/sub 3/ (BPB) thin film. Optical signals create quasiparticles and induce changes in the superconducting energy gap. These changes are measured by tunnel junctions which are formed along the grain boundaries in the BPB polycrystalline thin film. The detector sensitivity is about 10/sup 4/ V/W in the 1--8-..mu..m wavelength range, and the detector is found to be capable of responding up to 1.3 GHz at the 1.3-..mu..m wavelength. Consequently, this BPB detector is well suited in infrared spectrometer and optical-communications system applications.

• Research Organization: NTT Electrical Communication Laboratory, Tokai, Ibaraki-ken 319-11,Japan
• OSTI ID: 6010408
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 59:11; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

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440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
DESIGN
ELECTROMAGNETIC RADIATION
ENERGY GAP
FILMS
GRAIN BOUNDARIES
INFRARED RADIATION
INFRARED SPECTROMETERS
JUNCTIONS
LEAD COMPOUNDS
LEAD OXIDES
MEASURING INSTRUMENTS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHOTODETECTORS
PHOTOSENSITIVITY
RADIATIONS
SENSITIVITY
SPECTROMETERS
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
THIN FILMS
TUNNEL EFFECT