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Proceedings Paper

A voltage-tunable multi-spectral 320x256 InAs/GaAs quantum-dot infrared focal plane array (FPA)
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Paper Abstract

A voltage-tunable multispectral 320×256 infrared imaging focal plane array (FPA) is reported. The multispectral FPA is based on InAs/GaAs quantum dots infrared photodetectors (QDIP) with different capping layers (i.e. GaAs and In0.20Ga0.80As), corresponding to the extended middle-wave infrared (EMIR, 5-8 μm) and long-wave infrared (LWIR, 8- 12 μm) detection bands, respectively. The FPA shows a sensitivity of 8.2 mV/C a noise equivalent temperature difference of 172 mK at the FPA operating temperature of 67 K. Thermal images were obtained at both the EMIR and the LWIR bands at a low FPA bias of -0.7V. Voltage-tunable multispectral imaging was also achieved. Since each of the detection spectral of the QD FPA can be individually tuned by engineering its QD capping layer, this approach offers greater flexibility in designing detection spectrum of a multispectral FPA.

Paper Details

Date Published: 18 February 2009
PDF: 9 pages
Proc. SPIE 7224, Quantum Dots, Particles, and Nanoclusters VI, 72240W (18 February 2009); doi: 10.1117/12.813481
Show Author Affiliations
Jarrod Vaillancourt, Univ. of Massachusetts, Lowell (United States)
Puminun Vasinajindakaw, Univ. of Massachusetts, Lowell (United States)
Xuejun Lu, Univ. of Massachusetts, Lowell (United States)

Published in SPIE Proceedings Vol. 7224:
Quantum Dots, Particles, and Nanoclusters VI
Kurt G. Eyink; Frank Szmulowicz; Diana L. Huffaker, Editor(s)

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