Quantum cascade detectors in very long wave infrared

J Q Liu,S Q Zhai,F Q Liu,S M Liu,L J Wang,J C Zhang,Ning Zhuo, Z G Wang

Optoelectronic and Microelectronic Materials & Devices（2014）

Cited 4|Views7

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Abstract

Very long wave (> 14μm) infrared quantum cascade detectors based on III-V materials are presented. Thanks to the optimum design of electron transport mechanism, high detectivity is obtained without decreasing device responsivity. For the 14.2 μm QCD, a work temperature up to 82K is obtained with a peak responsivity about 0.95 mA/W and detectivity of 1×108 Jones. Peak responsivities is 2.34 mA/W and Johnson noise limited detectivities is 1×011 Jones, at 15K for the 18 μm devices.

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Key words

electron transport theory,infrared detectors,thermal noise,iii-v material,johnson noise,qcd,electron transport mechanism,infrared quantum cascade detector,size 14.2 mum,size 18 mum,temperature 15 k,very long wave infrared detector,quantum cascade detector,molecular beam epitaxy,photodetectors,very long wave infrared,dark current,noise,detectors,gallium arsenide,temperature measurement

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