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Proceedings Paper

Very long wave infrared quantum cascade detectors
Author(s): Jun-qi Liu; Shen-qiang Zhai; Feng-qi Liu; Zhan-guo Wang
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Paper 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 1×1011 cmHz1/2W-1 is achieved. Many of them exhibit high performance and give a cheerful prospect for the practical application in the near future.

Paper Details

Date Published: 20 November 2014
PDF: 8 pages
Proc. SPIE 9300, International Symposium on Optoelectronic Technology and Application 2014: Infrared Technology and Applications, 93000V (20 November 2014); doi: 10.1117/12.2071152
Show Author Affiliations
Jun-qi Liu, Institute of Semiconductors (China)
Shen-qiang Zhai, Institute of Semiconductors (China)
Feng-qi Liu, Institute of Semiconductors (China)
Zhan-guo Wang, Institute of Semiconductors (China)


Published in SPIE Proceedings Vol. 9300:
International Symposium on Optoelectronic Technology and Application 2014: Infrared Technology and Applications
Mircea Guina; Haimei Gong; Zhichuan Niu; Jin Lu, Editor(s)

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