Very long wave infrared quantum cascade detectors

Jun-qi Liu; Shen-qiang Zhai; Feng-qi Liu; Zhan-guo Wang

doi:10.1117/12.2071152

20 November 2014 Very long wave infrared quantum cascade detectors

Jun-qi Liu, Shen-qiang Zhai, Feng-qi Liu, Zhan-guo Wang

Proceedings Volume 9300, International Symposium on Optoelectronic Technology and Application 2014: Infrared Technology and Applications; 93000V (2014) https://doi.org/10.1117/12.2071152
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

Quantum cascade detectors (QCDs) are photovoltaic devices: they have a built in asymmetric conduction band potential formed by energy band engineering design, which allows for biasless operation. In this work, we focus on the very long wave infrared (VLWIR) quantum cascade photodectors involving energy band engineering, material technology, and devices physics. Targeting the common applications, we demonstrate a series of VLWIR QCDs from 14 to 20μm. The dark current density under 1.1×10^-11 Acm^-2 and the detectivity above 1×10¹¹cmHz^1/2W^-1is achieved. Many of them exhibit high performance and give a cheerful prospect for the practical application in the near future.

Citation Download Citation

Jun-qi Liu, Shen-qiang Zhai, Feng-qi Liu, and Zhan-guo Wang "Very long wave infrared quantum cascade detectors", Proc. SPIE 9300, International Symposium on Optoelectronic Technology and Application 2014: Infrared Technology and Applications, 93000V (20 November 2014); https://doi.org/10.1117/12.2071152

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