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

Jarrod Vaillancourt; Puminun Vasinajindakaw; Xuejun Lu

doi:10.1117/12.813481

18 February 2009 A voltage-tunable multi-spectral 320x256 InAs/GaAs quantum-dot infrared focal plane array (FPA)

Jarrod Vaillancourt, Puminun Vasinajindakaw, Xuejun Lu

Proceedings Volume 7224, Quantum Dots, Particles, and Nanoclusters VI; 72240W (2009) https://doi.org/10.1117/12.813481
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

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 In_0.20Ga_0.80As), 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.

Citation Download Citation

Jarrod Vaillancourt, Puminun Vasinajindakaw, and Xuejun Lu "A voltage-tunable multi-spectral 320x256 InAs/GaAs quantum-dot infrared focal plane array (FPA)", Proc. SPIE 7224, Quantum Dots, Particles, and Nanoclusters VI, 72240W (18 February 2009); https://doi.org/10.1117/12.813481

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