Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9828938 | Infrared Physics & Technology | 2005 | 7 Pages |
Abstract
A photovoltaic intersubband detector based on electron transfer on a cascade of quantum levels is presented which we called a Quantum Cascade Detector (QCD). The highest photoresponse of intersubband transition based photovoltaic detectors is demonstrated: 44Â mA/W at zero applied bias. Further improvements permit to suppress the leakage current and to increase the resistivity R0A. Useless cross-transitions have been eliminated finally leading to a high resistance narrow band photodetector with a Johnson noise limited detectivity at 50Â K comparable to QWIPs. Because they work with no dark current, QCDs are very promising for small pixel and large focal plane array applications.
Related Topics
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Authors
L. Gendron, C. Koeniguer, X. Marcadet, V. Berger,