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Proceedings Paper

Y-Ba-Cu-O thin films as high-speed IR detectors
Author(s): HoiSing Kwok; Jim P. Zheng; Q. Y. Ying
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Paper Abstract

Y-Ba-Cu-O thin film infrared detectors were fabricated and studied with various lasers. Operation of the detector in both the bolometric and nonbolometric modes was investigated at 10 microns with a CO2 laser. In the bolometric mode, the detectivity of the detector at 90 K was 2.1 x 10 to the 8th cm sq rt Hz/W with a response time of 15 microsec, corresponding to a bandwidth of 70 KHz. The speed of the detector in the nonbolometric mode was much faster and was beyond the instrument resolution. With a picosecond N2 laser, the output showed an instrument limited duration of 2 ns. The detectivity could not be determined in the nonbolometric mode due to the extremely low noise. The superconducting film quality is critical to the performance of these detectors.

Paper Details

Date Published: 1 October 1990
PDF: 10 pages
Proc. SPIE 1292, Superconductivity Applications for Infrared and Microwave Devices, (1 October 1990); doi: 10.1117/12.21037
Show Author Affiliations
HoiSing Kwok, SUNY/Buffalo (Hong Kong)
Jim P. Zheng, SUNY/Buffalo (United States)
Q. Y. Ying, SUNY/Buffalo (United States)

Published in SPIE Proceedings Vol. 1292:
Superconductivity Applications for Infrared and Microwave Devices
Kul B. Bhasin; Vernon O. Heinen, Editor(s)

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