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Proceedings Paper

Charge accumulation and multiplication photodetector
Author(s): Liang-Fu Lou; Kerry S. Kitazaki
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Paper Abstract

A charge-accumulation-and-multiplication photodetector (CHAMP) has been developed. The unit cell contains three coupled MOS capacitors designated as detector, transfer, and avalanche gates. The photocurrent at the detector gate is first integrated with the transfer gate closed and the avalanche gate ramping toward avalanche voltages. The charge is then transferred to the avalanche gate where charge multiplication occurs. These processes induce a displacement current pulse for readout which is proportional to the photocurrent, the integration time, and the multiplication gain factor, and is inversely proportional to the transfer time. A tunable current gain capable of exceeding the avalanche gain is achieved. A cooled CHAMP device is suitable for detecting photons of extremely low flux. The internal current gain and noise issues will be discussed.

Paper Details

Date Published: 15 October 1993
PDF: 11 pages
Proc. SPIE 2022, Photodetectors and Power Meters, (15 October 1993); doi: 10.1117/12.158567
Show Author Affiliations
Liang-Fu Lou, Northrop Corp. (United States)
Kerry S. Kitazaki, Northrop Corp. (United States)

Published in SPIE Proceedings Vol. 2022:
Photodetectors and Power Meters
Kenneth J. Kaufmann, Editor(s)

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