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.

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

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