Title :
Electromagnetic Modeling of Quantum Well Infrared Photodetectors
Author :
Choi, Kwong-Kit ; Jhabvala, Murzy D. ; Forrai, David P. ; Waczynski, Augustyn ; Sun, Jason ; Jones, Robert
Author_Institution :
U.S. Army Res. Labs., Adelphi, MD, USA
fDate :
3/1/2012 12:00:00 AM
Abstract :
Rigorous electromagnetic field modeling is applied to calculate the quantum efficiency of various quantum well infrared photodetector (QWIP) geometries. We found quantitative agreement between theory and experiment for corrugated-QWIPs, grating-coupled QWIPs, and enhanced-QWIPs, and the model explains adequately the spectral lineshapes of the quantum grid infrared photodetectors. After establishing our theoretical approach, we used the model to optimize the detector structures for 12-micron pixel pitch focal plane arrays.
Keywords :
diffraction gratings; focal planes; infrared detectors; photodetectors; quantum well devices; semiconductor device models; electromagnetic modeling; enhanced QWIP; grating coupled QWIP; pixel pitch focal plane array; quantum efficiency; quantum well infrared photodetectors; rigorous electromagnetic field modeling; Atmospheric modeling; Coatings; Detectors; Geometry; Gold; Gratings; Materials; Electromagnetic field modeling; infrared detector; quantum efficiency;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2011.2175706
