Y-Ba-Cu-O thin films as high-speed IR detectors

HoiSing Kwok; Jim P. Zheng; Q. Y. Ying

doi:10.1117/12.21037

1 October 1990 Y-Ba-Cu-O thin films as high-speed IR detectors

HoiSing Kwok, Jim P. Zheng, Q. Y. Ying

Proceedings Volume 1292, Superconductivity Applications for Infrared and Microwave Devices; (1990) https://doi.org/10.1117/12.21037
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

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.

Citation Download Citation

HoiSing Kwok, Jim P. Zheng, and Q. Y. Ying "Y-Ba-Cu-O thin films as high-speed IR detectors", Proc. SPIE 1292, Superconductivity Applications for Infrared and Microwave Devices, (1 October 1990); https://doi.org/10.1117/12.21037

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