Multi-spectral InAs/GaAs-based quantum dot infrared photodetector with quaternary (InAlGaAs) capping operates at low bias voltage

Sourav Adhikary; Subhananda Chakrabarti; Yigit Aytac; A.G.U. Perera

doi:10.1117/12.2002730

29 March 2013 Multi-spectral InAs/GaAs-based quantum dot infrared photodetector with quaternary (InAlGaAs) capping operates at low bias voltage

Sourav Adhikary, Subhananda Chakrabarti, Yigit Aytac, A.G.U. Perera

Author Affiliations +

Proceedings Volume 8634, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling X; 86340V (2013) https://doi.org/10.1117/12.2002730
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

The quantum dot infrared photodetector is an emerging technology for advanced imaging. Multi-color imaging technologies are favored as they extend the boundary of applications of the device. We report multi-spectral performance of MBE grown InGaAs/GaAs (device A) and InAs/GaAs (device B) based photodetector with In_0.21Al_0.21Ga_0.58As capping at 77K. Spectral response measurement of device A shows the presence of a strong photoresponse at 10.2μm. Device B exhibits a four color response (5.7, 9.0, 14.5, 17 and 20 μm) over a broad range (5-20μm) at very low bias voltage.

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Sourav Adhikary, Subhananda Chakrabarti, Yigit Aytac, and A.G.U. Perera "Multi-spectral InAs/GaAs-based quantum dot infrared photodetector with quaternary (InAlGaAs) capping operates at low bias voltage", Proc. SPIE 8634, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling X, 86340V (29 March 2013); https://doi.org/10.1117/12.2002730

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