Feasibility of room-temperature mid-wavelength infrared photodetectors using InAsSb nanostructured photoabsorbers

Dingkun Ren; Zixuan Rong; Cao Minh; Alan C. Farrell; Xiao Meng; Diana L. Huffaker

doi:10.1117/12.2296791

23 February 2018 Feasibility of room-temperature mid-wavelength infrared photodetectors using InAsSb nanostructured photoabsorbers

Dingkun Ren, Zixuan Rong, Cao Minh, Alan C. Farrell, Xiao Meng, Diana L. Huffaker

Author Affiliations +

Proceedings Volume 10531, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI; 105310Y (2018) https://doi.org/10.1117/12.2296791
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Compound semiconductor mid-wavelength infrared photodetectors operating at room temperature are the sensors of choice for demanding applications such as thermal imaging, heat-seeking, and spectroscopy. However, those detectors suffer from high dark current and thus normally require additional cooling accessories. In this work, we argue for the fundamental feasibility that by using nanowires coupled with plasmonic nano-antennae as photoabsorbers, the dark current can be largely reduced compared with typical planar devices. To demonstrate the idea, we simulate the device characteristics, such as dark current, responsivity, and detectivity, of InAsSb_0.07 nanowire photodetectors, and compare those properties with the best research InAs photovoltaic diodes. The results show that the designed nanowire detectors offer over one-order lower dark current and enable a peak detectivity of 7.0×10¹⁰ cm Hz^1/2W^-1 at 3.5 μm. We believe this work will provide a guidance to the design of nanowire-based MWIR photodetectors and stimulate additional experimental and theoretical research studies.

Citation Download Citation

Dingkun Ren, Zixuan Rong, Cao Minh, Alan C. Farrell, Xiao Meng, and Diana L. Huffaker "Feasibility of room-temperature mid-wavelength infrared photodetectors using InAsSb nanostructured photoabsorbers", Proc. SPIE 10531, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI, 105310Y (23 February 2018); https://doi.org/10.1117/12.2296791

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