Photovoltaic operation of quantum dot quantum cascade detector with low photoconductive gain for midwave infrared photodetection

Photovoltaic operation of quantum dot quantum cascade detector with low photoconductive gain for midwave infrared photodetection

We demonstrate photovoltaic operation of midwave (MW) quantum dot infrared photodetector (QDIP) with conventional n‐i‐n geometry, with a quantum cascade design. Quantum dot quantum cascade detector (QD‐QCD) provides zero bias operation with responsivity of 10 mA/W and detectivity of 9×109 cm.Hz1/2W‐...

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Veröffentlicht in:Physica status solidi. C 2013-05, Vol.10 (5), p.756-760
Hauptverfasser: Barve, Ajit V., Krishna, Sanjay
Format: Artikel
Sprache:eng
Schlagworte:
cascade
Cascades
Detectors
Focal plane
Gain
Infrared
photodetector
photovoltaic
Photovoltaic cells
quantum dot
Quantum dots
Solar cells
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Zusammenfassung:We demonstrate photovoltaic operation of midwave (MW) quantum dot infrared photodetector (QDIP) with conventional n‐i‐n geometry, with a quantum cascade design. Quantum dot quantum cascade detector (QD‐QCD) provides zero bias operation with responsivity of 10 mA/W and detectivity of 9×109 cm.Hz1/2W‐1 at 77 K for f/2 optics. Measured photoconductive gain is below 0.4, which is difficult to obtain with the traditional QDIP architecture, and is highly attractive for focal plane array applications. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:1862-6351
1610-1642
DOI:10.1002/pssc.201200675