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Proceedings Paper

Very longwave infrared (> 14 µm) quantum-dot photodetector
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Paper Abstract

We report a very longwave Infrared (> 14 μm) quantum dot photodetector working at 77 K. Very longwave infrared (VLWIR) detection at a cut-off wavelength of 15.3 μm was achieved through QD size engineering. Peak specific photodetectivity D* of 3.3x108 cmHz1/2/W. A large photoresponsivity of 0.93 A/W and high photoconductive gain of 62.4 were demonstrated at a bias voltage of V = 3.7 V at T = 77 K. The low-bias and liquid nitrogen temperature performance demonstration based on InAs-GaAs material systems indicates that the QDIP technology is promising for VLWIR sensing and imaging.

Paper Details

Date Published: 6 May 2009
PDF: 7 pages
Proc. SPIE 7298, Infrared Technology and Applications XXXV, 72980C (6 May 2009); doi: 10.1117/12.819120
Show Author Affiliations
Jarrod Vaillancourt, Univ. of Massachusetts Lowell (United States)
Xuejun Lu, Univ. of Massachusetts Lowell (United States)

Published in SPIE Proceedings Vol. 7298:
Infrared Technology and Applications XXXV
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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