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Proceedings Paper

An electrically-controllable multi-spectral quantum dot infrared photodetector with high photodetectivity
Author(s): Xuejun Lu; Jarrod Vaillancourt; Mark J. Meisner
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Paper Abstract

We present an electrically-controllable multi-spectral quantum dot infrared photodetector (QDIP). The QDIP consists of vertically-stacked InAs quantum dots layers with two different capping layers for MWIR and LWIR absorption, respectively. The multi-spectral QDOP is capable of simultaneously detecting multi-spectral normal incidence through inter-subband transitions in the three-dimensional (3-D) confined quantum dot nanostructures. The QDIP showed multi-color IR detection bands centered at 5.6μm, 7.7 μm and 10.0μm, respectively. By tuning the bias voltage, the detection band can be individual turned on. High photodetectivity of > 2.3×1010cmHz1/2/W were obtained for these IR detection bands. The voltage-controllable detection band selection enables real-time system reconfiguration to focus on the band of interest. The vertically-stacked device structure allows easy construction of focal plane arrays (FPA).

Paper Details

Date Published: 14 May 2007
PDF: 8 pages
Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65420Q (14 May 2007); doi: 10.1117/12.721265
Show Author Affiliations
Xuejun Lu, Univ. of Massachusetts/Lowell (United States)
Jarrod Vaillancourt, Univ. of Massachusetts/Lowell (United States)
Mark J. Meisner, Raytheon Missile Systems (United States)

Published in SPIE Proceedings Vol. 6542:
Infrared Technology and Applications XXXIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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