New resonant cavity-enhanced absorber structures for mid-infrared detector applications

A new dielectric Fabry–Perot cavity was designed for a resonant enhancing optical absorption by a thin absorber layer embedded into the cavity. In this cavity, the front mirror is a subwavelength grating with ~ 100% retroreflection. For a HgCdTe absorber in a matching cavity of the new type, the des...

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Published in:Optical and quantum electronics 2012-06, Vol.44 (3-5), p.95-102
Main Authors: Zohar, Moshe, Auslender, Mark, Faraone, Lorenzo, Hava, Shlomo
Format: Article
Language:English
Subjects:
Cadmium compounds
Characterization and Evaluation of Materials
Computer Communication Networks
Detectors
Devices
Electrical Engineering
Gratings (spectra)
Holes
Intermetallics
Lasers
Mercury compounds
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Tellurides
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description A new dielectric Fabry–Perot cavity was designed for a resonant enhancing optical absorption by a thin absorber layer embedded into the cavity. In this cavity, the front mirror is a subwavelength grating with ~ 100% retroreflection. For a HgCdTe absorber in a matching cavity of the new type, the design is shown to meet the combined challenges of increasing the absorbing efficiency of the entire device up to ~ 100 % and reducing its size and overall complexity, compared to a conventional resonant cavity enhanced HgCdTe absorber, while maintaining a fairly good tolerance against the grating’s fabrication errors.
doi_str_mv 10.1007/s11082-011-9515-2
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subjects Cadmium compounds
Characterization and Evaluation of Materials
Computer Communication Networks
Detectors
Devices
Electrical Engineering
Gratings (spectra)
Holes
Intermetallics
Lasers
Mercury compounds
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Tellurides
title New resonant cavity-enhanced absorber structures for mid-infrared detector applications
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