A novel design for direct-hybrid far-infrared photoconductor arrays

Jam Farhoomand

doi:10.1117/12.550103

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8 October 2004 A novel design for direct-hybrid far-infrared photoconductor arrays

Jam Farhoomand

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Proceedings Volume 5498, Millimeter and Submillimeter Detectors for Astronomy II; (2004) https://doi.org/10.1117/12.550103
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

Fabrication of direct hybrid far infrared photoconductor arrays, especially for low background astronomy, is particularly challenging due to arrays' relatively large pixel size, susceptibility to stray radiation even from the faintest IR source, and the requirement for low bias levels. In fact, these problems have hindered the development of far IR direct hybrid arrays, which has been the standard practice for the near and mid IR arrays. In this paper, a new and novel design is presented that addresses the complications afflicting the direct hybrid approach and paves the way for the development of large-format far IR arrays. In particular, the readout glow, detector heating, and thermal mismatch between the readout and the detector array are addressed. The use of a capacitive transimpedance amplifier effectively eliminates the detector debiasing.

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Jam Farhoomand "A novel design for direct-hybrid far-infrared photoconductor arrays", Proc. SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy II, (8 October 2004); https://doi.org/10.1117/12.550103

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