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Proceedings Paper

Narrow spectral band monolithic lead-chalcogenide-on-Si mid-IR photodetectors
Author(s): Hans Zogg; Martin Arnold
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Paper Abstract

Narrow spectral band infrared detectors are required for multispectral infrared imaging. Wavelength selectivity can be obtained by placing passive line filters in front of the detectors, or, the preferred choice, by making the detectors themselfs wavelength selective. We review the first photovoltaic resonant cavity enhanced detectors (RCED) for the mid-IR range. The lead-chalcogenide (PbEuSe) photodetector is placed as a very thin layer inside an optical cavity. At least one side is terminated with an epitaxial Bragg mirror (consisting of quarter wavelength PbEuSe/BaF2 pairs), while the second mirror may be a metal. Linewidths are as narrow as 37 nm at a peak wavelength of 4400 nm, and peak quantum efficiencies up to above 50% are obtained.

Paper Details

Date Published: 29 September 2005
PDF: 6 pages
Proc. SPIE 5957, Infrared Photoelectronics, 59570B (29 September 2005); doi: 10.1117/12.621885
Show Author Affiliations
Hans Zogg, ETH Zürich (Switzerland)
Martin Arnold, ETH Zürich (Switzerland)

Published in SPIE Proceedings Vol. 5957:
Infrared Photoelectronics
Antoni Rogalski; Eustace L. Dereniak; Fiodor F. Sizov, Editor(s)

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