Optical detector using granular YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// weak link-type junctions

Author

Kexi Xu ; Shiping Zhou ; Jia-Shan Bao ; Wei-Wei Xu ; Huabing Wang

Author_Institution

Dept. of Phys., Shanghai Univ., China

Volume

6

Issue

2

fYear

1996

fDate

6/1/1996 12:00:00 AM

Firstpage

87

Lastpage

89

Abstract

Experimental photoresponse study of granular YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) weak link is reported. The Josephson critical current I/sub c/ is suppressed with light illumination of the junction, produced mainly from optical generation of quasiparticles. At lower temperature (T=64.5 K), the hysteresis in I-V characteristic of the weak link appears, which may be found useful for optical detection purpose. This was supported from preliminary experiments.

Keywords

Josephson effect; barium compounds; high-temperature superconductors; photodetectors; superconducting device testing; superconducting junction devices; yttrium compounds; 64.5 K; I-V characteristic; Josephson junction devices; YBa/sub 2/Cu/sub 3/O/sub 7/; granular weak link-type junctions; high-temperature superconductors; optical detector; photoresponse; quasiparticle generation; Bridge circuits; Granular superconductors; Hysteresis; Josephson junctions; Laser beams; Optical detectors; Optical films; Superconducting films; Temperature; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.506688

Filename

506688