Microwave-assisted far-infrared photoconductivity in high-purity GaAs

Jam Farhoomand; Robert E McMurray Jr.; David L Sisson; Christopher T Koerber

doi:10.1117/12.510383

10 November 2003 Microwave-assisted far-infrared photoconductivity in high-purity GaAs

Jam Farhoomand, Robert E McMurray Jr., David L Sisson, Christopher T Koerber

Proceedings Volume 5152, Infrared Spaceborne Remote Sensing XI; (2003) https://doi.org/10.1117/12.510383
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

We have observed, for the first time, microwave-assisted photoconductivity in high purity GaAs. The enhancement of response appears to be dictated by two distinct mechanisms. First, a broadband enhancement which is believed to be due to detrapping of the free carriers and, therefore, increased photoconductive gain. Secondly, microwave-ionization of the excited states. We expect that both of these mechanisms contribute very little, if any, to the detector noise and, therefore, improve the detector's NEP. In this paper, we report the results of our preliminary tests showing broadband enhancement in response and an indication of enhancement of the excited-state response. Further investigation is currently underway.

Citation Download Citation

Jam Farhoomand, Robert E McMurray Jr., David L Sisson, and Christopher T Koerber "Microwave-assisted far-infrared photoconductivity in high-purity GaAs", Proc. SPIE 5152, Infrared Spaceborne Remote Sensing XI, (10 November 2003); https://doi.org/10.1117/12.510383

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