Development of voltage-tunable IR photodetector

Gyana R. Biswal; Michael Yakimov; Vadim Tokranov; Kimberly Sablon; Sergey Tulyakov; Vladimir Mitin; Serge Oktyabrsky

doi:10.1117/12.2677169

10 October 2023 Development of voltage-tunable IR photodetector

Gyana R. Biswal, Michael Yakimov, Vadim Tokranov, Kimberly Sablon, Sergey Tulyakov, Vladimir Mitin, Serge Oktyabrsky

Proceedings Volume 12687, Infrared Sensors, Devices, and Applications XIII; 126870B (2023) https://doi.org/10.1117/12.2677169
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

Artificial Intelligence-based object recognition in the infrared spectrum region is essential for autonomous applications and will likely require on-demand spectral tuning of an imaging sensor. Here we develop a quantum well infrared photodetector (QWIP) with an asymmetrically doped double quantum well (QW) array which provides the means to control its spectral sensitivity with an applied bias. The test structures were designed using a Schrödinger-Poisson solver to find the electronic transition energies for symmetric and antisymmetric double-QW states. The design, growth, and characterization of QWIPs have been performed aiming at the 5-8 μm and 8-12 μm detection wavelengths. The structures were grown by molecular beam epitaxy and contained 25 periods of coupled double GaAs QWs and Al_xGa_1-xAs barriers. One of the QWs in the pair was doped to provide potential asymmetry allowing for control of the electron population on the split levels by the bias applied to the QWIP. The QW structures were calibrated using TEM, and tested with blackbody radiation and FTIR down to 77 K. As a result, the ratio of the responsivities of the two bands at about 8 and 11 μm as well as 5 and 8 μm was controlled with up to an order of magnitude by the applied bias within +/- 4V.

Conference Presentation

Citation Download Citation

Gyana R. Biswal, Michael Yakimov, Vadim Tokranov, Kimberly Sablon, Sergey Tulyakov, Vladimir Mitin, and Serge Oktyabrsky "Development of voltage-tunable IR photodetector", Proc. SPIE 12687, Infrared Sensors, Devices, and Applications XIII, 126870B (10 October 2023); https://doi.org/10.1117/12.2677169

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