The authors performed a detailed study of two-dimensional grating coupling for quantum well infrared photodetectors in the very long wavelength spectral region lambda nearly equal to 16 up to 17 um. Using calculations based on the modal expansion method the authors quantitatively explain the double peaked responsivity spectrum. By optimizing the grating parameters the authors achieve a normal incidence responsivity and detectivity which are three times larger than 45 deg of angle of incidence geometry.
Optimization of two dimensional gratings for very long wavelength quantum well infrared photodetectors
Optimierung des zweidimensionalen Beugungsgitters von Quantentopf-Photodetektoren für sehr langwellige Infrarotstrahlung
Journal of Applied Physics ; 76 , 9 ; 4989-4994
1994
6 Seiten, 13 Bilder, 16 Quellen
Article (Journal)
English
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