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Proceedings Paper

A comparative design study for MWIR HgCdTe detectors
Author(s): Yigit Ozer; Serdar Kocaman
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Paper Abstract

High performance multi-layer MWIR HgCdTe detector design requires detailed analysis considering the interaction between layers and the nonlinear effects. For this purpose, an in-house numerical model is utilized so that electrical and optical parameters are manipulated to eliminate the undesired performance limits. An ideal detector with perfect crystal quality is expected to have diffusion limited dark current. However, for low operating temperatures (<120K), which is usually the case for the high performance applications, SRH mechanism may dominate dark current especially for alternative substrate detectors and low crystal quality resulting in a short SRH lifetime (~200ns). Here, physical sizes, composition and doping profiles are optimized to suppress generation-recombination (GR) dark current so that cooling burden can be minimized. We numerically achieve ~30K (from ~85K to ~115K) increase on the operating temperature without degrading the system performance parameters for the detection of near room temperature object (300K) by placing a wide bandgap layer inside the bandgap.

Paper Details

Date Published: 16 May 2017
PDF: 10 pages
Proc. SPIE 10177, Infrared Technology and Applications XLIII, 101771H (16 May 2017); doi: 10.1117/12.2262717
Show Author Affiliations
Yigit Ozer, Middle East Technical Univ. (Turkey)
Serdar Kocaman, Middle East Technical Univ. (Turkey)

Published in SPIE Proceedings Vol. 10177:
Infrared Technology and Applications XLIII
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; John Lester Miller; Paul R. Norton, Editor(s)

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