2014
DOI: 10.1117/12.2071152
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Very long wave infrared quantum cascade detectors

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 dete… Show more

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