Special Section: Selected Papers from the 3rd Mediterranean Conference on Nanophotonics

Novel resonant cavity-enhanced absorber structures for high-efficiency midinfrared photodetector application

[+] Author Affiliations
Moshe Zohar

Sami Shamoon College of Engineering, POB 950, Beer Sheva, 84100 Israel zoharmo@ee.bgu.ac.il

Ben Gurion University of the Negev, Department of Electrical and Computer Engineering, POB 653, Beer Sheva, 84105 Israel marka@ee.bgu.ac.il

Mark Auslender

Ben Gurion University of the Negev, Department of Electrical and Computer Engineering, POB 653, Beer Sheva, 84105 Israel marka@ee.bgu.ac.il

Lorenzo Faraone

University of Western Australia, School of Electrical, Electronic and Computer Engineering, M018 35 Stirling Highway, Crawley, Western Australia, 6009 Australia

Shlomo Hava

Ben Gurion University of the Negev, Department of Electrical and Computer Engineering, POB 653, Beer Sheva, 84105 Israel marka@ee.bgu.ac.il

J. Nanophoton. 5(1), 051824 (September 09, 2011). doi:10.1117/1.3634057
History: Received March 07, 2011; Revised July 11, 2011; Accepted August 18, 2011; Published September 09, 2011; Online September 09, 2011
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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.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Moshe Zohar ; Mark Auslender ; Lorenzo Faraone and Shlomo Hava
"Novel resonant cavity-enhanced absorber structures for high-efficiency midinfrared photodetector application", J. Nanophoton. 5(1), 051824 (September 09, 2011). ; http://dx.doi.org/10.1117/1.3634057


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