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Proceedings Paper

Coupling efficiency of metal gratings in a normal incident GaAs/AlGaAs quantum well infrared detector
Author(s): Yu Jun Yang; Guanqun Xia; Shichang Zou; Xun Wang
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Paper Abstract

A numerical calculation of coupling efficiency of planar metal grating coupled GaAs/AlGaAs quantum well infrared detectors has been made in this work. The results showed that the coupling efficiency is a function of the ratio of the grating period (Lambda) to the intersubband resonance wavelength (lambda) for various degrees of metal filling. In the vicinity of n(Lambda) /(lambda) < 1 (n is the refractive index), filling factors round 0.5 - 0.7 give large longitudinal electric-field components, which induces a strong coupling to the intersubband absorption in the quantum well structures of the semiconductor. Numerical calculations provide detailed guidelines for obtaining optimum coupling for GaAs/AlGaAs quantum well infrared detectors.

Paper Details

Date Published: 25 September 1996
PDF: 6 pages
Proc. SPIE 2894, Detectors, Focal Plane Arrays, and Applications, (25 September 1996); doi: 10.1117/12.252121
Show Author Affiliations
Yu Jun Yang, Shanghai Metallurgic Institute (China)
Guanqun Xia, Shanghai Metallurgic Institute (China)
Shichang Zou, Shanghai Metallurgic Institute (China)
Xun Wang, Fudan Univ. (China)

Published in SPIE Proceedings Vol. 2894:
Detectors, Focal Plane Arrays, and Applications
William G. D. Frederick; Junhong Su; Marc Wigdor, Editor(s)

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