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Optical Engineering

New generation of near-room-temperature photodetectors
Author(s): Jozef Piotrowski; Waldemar Gawron; Zoran G. Djuric
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Paper Abstract

The major drawback of IR photodetectors is the need for cooling to suppress thermal generation of free carriers resulting in noise. New ways to improve the performance of infrared photodetectors operated without cryogenical cooling are discussed, including the optimum design of the devices, the use of optical immersion of photodetectors to high refraction index lenses, and the optical resonant cavity. Another and very promising way, however, is the suppression of thermal generation, which is governed by the Auger mechanism by depletion of the semiconductor in charge carriers. The stationary depletion can be achieved by the use of exclusion, extraction, and magnetoconcentration effects. The combination of various methods would eventually enable us to achieve near-background-limited photodetection (near-BLIP) performance of IR detectors without cooling.

Paper Details

Date Published: 1 May 1994
PDF: 9 pages
Opt. Eng. 33(5) doi: 10.1117/12.165795
Published in: Optical Engineering Volume 33, Issue 5
Show Author Affiliations
Jozef Piotrowski, Vigo System (Poland)
Waldemar Gawron, Institute of Technical Physics (Poland)
Zoran G. Djuric, Univ. of Belgrade, IHTM (Serbia)

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