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Proceedings Paper

Infrared optical response of superconducting YBaCuO thin films
Author(s): Han-Don Sun; Fang Qiao Zhou; Xing-Rong Zhao; Lingjie Wang; Xinjian Yi
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Paper Abstract

Results of measurements of the optical response of high Tc superconducting infrared detectors fabricated from YBaCuO thin films for wavelengths of 3-5 micrometers and 8-14 micrometers at an operating temperature above liquid nitrogen. The measurements of a meander line detector yield a noise equivalent power (NEP) of 2 X 10-9 w Hz-1/2 and a detectivity (D*) of 1.5 X 108 cmHz1/2W-1 for radiation of 8-14 micrometers at a chopping frequency of 50 Hz. The response for 3-5 micrometers radiation is lower than that for 8-14 micrometers for the same detector. The authors have investigated the dependence of the optical response of these detectors on several parameters, including bias current, chopping frequency, substrate material, and film quality (associated with different fabricating methods). In addition, the device design and methods to improve the sensitivity have been discussed.

Paper Details

Date Published: 1 July 1991
PDF: 4 pages
Proc. SPIE 1477, Superconductivity Applications for Infrared and Microwave Devices II, (1 July 1991); doi: 10.1117/12.45615
Show Author Affiliations
Han-Don Sun, Huazhong Univ. of Science & Technology (China)
Fang Qiao Zhou, Huazhong Univ. of Science & Technology (China)
Xing-Rong Zhao, Huazhong Univ. of Science & Technology (China)
Lingjie Wang, Huazhong Univ. of Science & Technology (China)
Xinjian Yi, Huazhong Univ. of Science & Technology (China)


Published in SPIE Proceedings Vol. 1477:
Superconductivity Applications for Infrared and Microwave Devices II
Vernon O. Heinen; Kul B. Bhasin, Editor(s)

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