High resistance narrow band quantum cascade photodetectors

A high resistance narrow band quantum cascade photodetector (QCD) is presented. Leakage current has been suppressed, increasing the resistivity, thanks to a design in which coupling barriers have been thickened. Useless cross transitions have been eliminated finally leading to a Johnson noise detect...

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Veröffentlicht in:Applied physics letters 2005-03, Vol.86 (12), p.121116-121116-3
Hauptverfasser: Gendron, L., Koeniguer, C., Berger, V., Marcadet, X.
Format: Artikel
Sprache:eng
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Zusammenfassung:A high resistance narrow band quantum cascade photodetector (QCD) is presented. Leakage current has been suppressed, increasing the resistivity, thanks to a design in which coupling barriers have been thickened. Useless cross transitions have been eliminated finally leading to a Johnson noise detectivity at 50 K comparable to quantum well infrared photodetectors. Because they work with no dark current, QCDs are very promising for small pixel and large focal plane array applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1884257