Optimization of two dimensional gratings for very long wavelength quantum well infrared photodetectors
- 1 November 1994
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 76 (9) , 4989-4994
- https://doi.org/10.1063/1.357209
Abstract
We have performed a detailed study of two-dimensional grating coupling for quantum well infrared photodetectors in the very long wavelength spectral region λ∼16–17 μm. Using calculations based on the modal expansion method we quantitatively explain the double peaked responsivity spectrum. By optimizing the grating parameters we achieve a normal incidence responsivity and detectivity which are three times larger than the 45° angle of incidence geometry.This publication has 13 references indexed in Scilit:
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