Title :
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
fDate :
6/1/1996 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
