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20 January 2012 Electromagnetic design of resonator-QWIPs
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Abstract
Rigorous electromagnetic field modeling is applied to calculate the quantum efficiency (QE) of various quantum well infrared photodetector (QWIP) geometries. We found quantitative agreement between theory and experiment for linear grating coupled QWIPs, cross-grating coupled QWIPs, corrugated-QWIPs, and enhanced-QWIPs. Also, the model adequately explains the spectral lineshapes of the quantum grid infrared photodetectors. Equipped with a quantitative model, we designed resonant cavities that are suitable for narrowband imaging around 8 - 9 microns. The results show that with properly designed structures, the theoretical QE can be as high as 78% for 25-micron pixel pitch arrays and 46% for 12-micron pixel pitch arrays. Experimental efforts are underway.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. K. Choi, M. D. Jhabvala, D. P. Forrai, A. Waczynaski, J. Sun, and R. Jones "Electromagnetic design of resonator-QWIPs", Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82682O (20 January 2012); https://doi.org/10.1117/12.903605
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