Resonant cavity enhanced photodetectors for the mid-wave infrared

Authors :: Gary W. Wicks
Terry Golding
Adam P. Craig
Greg R. Savich
Andrew R. J. Marshall
Source :: Emerging Imaging and Sensing Technologies for Security and Defence IV.
Publication Year :: 2019
Publisher :: SPIE, 2019.
Abstract: We present III-Sb resonant cavity-enhanced (RCE) photodetectors suitable for gas detection in the mid-wave infrared. AlAsSb/GaSb DBRs and absorbers of bulk InAsSb or a type-II InAsSb-InAs SLS were grown on GaSb, allowing for operation at 3.72 μm or 4.52 μm, with linewidth Δλ 20x reduction in noise compared with a conventional nBn detector with full thickness absorber. At 3.72 μm, performance above the BLIP limit imposed on broadband photodetectors was found by calculating for the specific detectivity.

Subjects :: Laser linewidth
Materials science
Infrared
business.industry
Detector
Broadband
Optoelectronics
Photodetector
Specific detectivity
Resonant cavity
business
Noise (electronics)

Database :: OpenAIRE
Journal :: Emerging Imaging and Sensing Technologies for Security and Defence IV
Accession number :: edsair.doi...........b61bf159072a7e3c6d129833b62a2b5d
Full Text :: https://doi.org/10.1117/12.2536900