Optimization of two dimensional gratings for very long wavelength quantum well infrared photodetectors

G. Sarusi, B. F. Levine, S. J. Pearton, K. M.S. Bandara, R. E. Leibenguth, J. Y. Andersson

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

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.

Original languageEnglish
Pages (from-to)4989-4994
Number of pages6
JournalJournal of Applied Physics
Volume76
Issue number9
DOIs
StatePublished - 1 Dec 1994
Externally publishedYes

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