Title :
Responsivity calculation and measurement of YBaCuO optical detector
Author :
Hao, J.H. ; Zhou, F.Q. ; Zhao, X.R. ; Sun, H.D. ; Yi, X.J. ; Li, Z.G.
Author_Institution :
Dept. of Opt. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
fDate :
3/1/1993 12:00:00 AM
Abstract :
The optical response of granular YBa/sub 2/Cu/sub 3/O/sub 7- delta / films using microbridge structure was investigated. Considering the self-heating effect of the detector from the bias current, a bolometric model was proposed to calculate the temperature rise and responsivity of the bolometer. The responsivity of a nonequilibrium detector on the basis of grain boundary Josephson junctions in granular films has also been demonstrated. Optical detectors with responsivities of more than 10/sup 3/ v/w at liquid nitrogen temperature have been fabricated. Experimental evidence for the coexistence of bolometric and nonbolometric effect is given. Calculations based on the proposed model are in agreement with the experimental results.<>
Keywords :
Josephson effect; barium compounds; bolometers; grain boundaries; high-temperature superconductors; infrared detectors; superconducting junction devices; superconducting thin films; yttrium compounds; HTSC films; IR detection; bias current; bolometric model; grain boundary Josephson junctions; granular YBa/sub 2/Cu/sub 3/O/sub 7- delta /; microbridge structure; nonbolometric effect; nonequilibrium detector; optical detector; optical response; responsivity; self-heating effect; Bolometers; Electron optics; Equations; Grain boundaries; Optical detectors; Optical films; Optical noise; Temperature; Thermal resistance; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
