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Journal of Nanophotonics

Novel resonant cavity-enhanced absorber structures for high-efficiency midinfrared photodetector application
Author(s): Moshe Zohar; Mark Auslender; Lorenzo Faraone; Shlomo Hava
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Paper Abstract

A new dielectric Fabry-Perot cavity is considered for enhanced optical absorption in a thin semiconductor layer embedded within the resonant cavity. In this design, the front (furthest from the illuminated side) mirror is a grating structure with nearly perfect retroreflection. Proof of concept, including semianalytical calculation, and computer-aided design and simulation is performed for application in a midinfrared wavelength band based on a HgCdTe absorbing layer. The results indicate that this new type of cavity meets the combined challenges of significantly increasing the absorption efficiency and reducing the overall complexity and size of the entire device, in comparison to a conventional resonant cavity, in which both mirrors are formed from quarter-wavelength multilayer stacks.

Paper Details

Date Published: 1 January 2011
PDF: 16 pages
J. Nanophoton. 5(1) 051824 doi: 10.1117/1.3634057
Published in: Journal of Nanophotonics Volume 5, Issue 1
Show Author Affiliations
Moshe Zohar, Sami Shamoon College of Engineering (Israel)
Mark Auslender, Ben-Gurion Univ. of the Negev (Israel)
Lorenzo Faraone, The Univ. of Western Australia (Australia)
Shlomo Hava, Ben-Gurion Univ. of the Negev (Israel)

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