Transcription of Linear-mode single-photon APD detectors - Voxtel …
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Linear-mode single-photon APD detectors - Voxtel …
Linear-mode single - photon APD detectors Andrew S. Huntington*, Madison A. Compton, and George M. Williams Voxtel , Inc., 12725 SW Millikan Way, Suite 230, Beaverton, OR USA 97005 ABSTRACT In the past, it has been necessary to operate avalanche photodiodes (APDs) in Geiger mode to perform photon counting. The gain and noise performance of available Linear-mode APDs was too poor to detect the photocurrent pulse from a single photon using existing amplifier technology. We review the performance thresholds required to achieve Linear-mode photon counting, and present measurements from two APD designs that meet the gain and noise requirements. The first design is a previously-reported vertical-junction, electron-avalanche HgCdTe device fabricated from m-cutoff liquid phase epitaxy (LPE)-grown material. These HgCdTe APDs have an excess noise factor of approximately F~1 at a gain of M=150 when measured at 196 K.
Linear-mode single-photon APD detectors Andrew S. Huntington *, Madison A. Compton, and George M. Williams Voxtel, Inc., 12725 SW Millikan Way, Suite 230, Beaverton, OR USA 97005
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