Optical detector prepared by high-Tc superconducting thin film

Lingjie Wang; Fang Qiao Zhou; Xing-Rong Zhao; Han-Don Sun; Xinjian Yi

doi:10.1117/12.48781

1 December 1991 Optical detector prepared by high-T_c superconducting thin film

Lingjie Wang, Fang Qiao Zhou, Xing-Rong Zhao, Han-Don Sun, Xinjian Yi

Proceedings Volume 1540, Infrared Technology XVII; (1991) https://doi.org/10.1117/12.48781
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

An optical detector prepared by high Tc superconducting thin film has been discussed. The device has been made from YBaCuO superconducting thin film with zero resistance at more than 80 K on a ZrO2 substrate. A pattern of the device with the dimension of the microbridge is formed through photolithographic process. Electrical contacts are made by evaporating gold or silver with thickness of 0.5 - 1 micrometers . The sample is then placed in a dewar with an infrared window and is cooled by liquid nitrogen. A blackbody source at 800 K is used to measure the responsivity of the detector, and the infrared radiation is chopped at frequencies between 6.3 and 2000 Hz. The detector output with the detectivity larger than 109 cmHz1/2/w and a typical responsivity value as large as 103 V/w is observed on both lock-in amplifier and root-mean-square voltmeter. In addition, the mechanism of optical detection and the methods to improve the sensitivity have been described.

Citation Download Citation

Lingjie Wang, Fang Qiao Zhou, Xing-Rong Zhao, Han-Don Sun, and Xinjian Yi "Optical detector prepared by high-T_c superconducting thin film", Proc. SPIE 1540, Infrared Technology XVII, (1 December 1991); https://doi.org/10.1117/12.48781

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