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Title: Improved performance of HgCdTe infrared detector focal plane arrays by modulating light field based on photonic crystal structure

An HgCdTe long-wavelength infrared focal plane array photodetector is proposed by modulating light distributions based on the photonic crystal. It is shown that a promising prospect of improving performance is better light harvest and dark current limitation. To optimize the photon field distributions of the HgCdTe-based photonic crystal structure, a numerical method is built by combining the finite-element modeling and the finite-difference time-domain simulation. The optical and electrical characteristics of designed HgCdTe mid-wavelength and long-wavelength photon-trapping infrared detector focal plane arrays are obtained numerically. The results indicate that the photon crystal structure, which is entirely compatible with the large infrared focal plane arrays, can significantly reduce the dark current without degrading the quantum efficiency compared to the regular mesa or planar structure.
Authors:
; ; ; ; ;  [1] ;  [2]
  1. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu Tian Road, Shanghai 200083 (China)
  2. Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072 (China)
Publication Date:
OSTI Identifier:
22275558
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CADMIUM TELLURIDES; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; CRYSTAL STRUCTURE; CRYSTALS; DESIGN; ELECTRIC CURRENTS; FINITE DIFFERENCE METHOD; FINITE ELEMENT METHOD; MERCURY COMPOUNDS; NANOSTRUCTURES; PERFORMANCE; PHOTONS; QUANTUM EFFICIENCY; TRAPPING; VISIBLE RADIATION