Statistics – Applications
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2894..263y&link_type=abstract
Proc. SPIE Vol. 2894, p. 263-268, Detectors, Focal Plane Arrays, and Applications, William G. Frederick; Junhong Su; Marc Wigdor
Statistics
Applications
Scientific paper
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.
Wang Xun
Xia Guanqun
Yang Yu
Zou Shichang
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