1 July 1991 Infrared optical response of superconducting YBaCuO thin films
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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.
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Han-Don Sun, Han-Don Sun, Fang Qiao Zhou, Fang Qiao Zhou, Xing-Rong Zhao, Xing-Rong Zhao, Lingjie Wang, Lingjie Wang, Xinjian Yi, Xinjian Yi, } "Infrared optical response of superconducting YBaCuO thin films", Proc. SPIE 1477, Superconductivity Applications for Infrared and Microwave Devices II, (1 July 1991); doi: 10.1117/12.45615; https://doi.org/10.1117/12.45615
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