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Proceedings Paper

Quantum well infrared photodetector simultaneously working in the two atmospheric windows
Author(s): Y. H. Huo; W. Q. Ma; Y. H. Zhang; M. Chong; T. Yang; L. H. Chen; Y. L. Shi
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Paper Abstract

We have demonstrated a dual-band quantum well infrared photodetector (QWIP) exhibiting simultaneous photoresponse both in the mid and the long wavelength atmospheric windows of 3-5 μm and of 8-12 μm, but the device only has two ohmic contacts. The structure of the device was achieved by sequentially growing a mid wavelength part (MWQWIP) followed by a long wavelength part (LWQWIP) separated by an n+ layer. Comparing with the conventional dual-band QWIP device utilizing three ohmic contacts, our QWIP is promising to greatly facilitate the two-color focal plane array (FPA) fabrication by reducing the number of the indium bump per pixel from three to one just like a monochromatic FPA fabrication; another advantage may be that this QWIP FAP boasts two-color detection capability while only using a monochromatic readout integrated circuit.

Paper Details

Date Published: 5 August 2009
PDF: 6 pages
Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73831P (5 August 2009); doi: 10.1117/12.836647
Show Author Affiliations
Y. H. Huo, Institute of Semiconductors (China)
W. Q. Ma, Institute of Semiconductors (China)
Y. H. Zhang, Institute of Semiconductors (China)
M. Chong, Institute of Semiconductors (China)
T. Yang, Institute of Semiconductors (China)
L. H. Chen, Institute of Semiconductors (China)
Y. L. Shi, Kunming Institute of Physics (China)


Published in SPIE Proceedings Vol. 7383:
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications
Jeffery Puschell; Hai-mei Gong; Yi Cai; Jin Lu; Jin-dong Fei, Editor(s)

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