High-performance short-wavelength infrared photodetectors based on type-II InAs/InAs1-xSbx/AlAs1-xSbx superlattices

M. Razeghi; A. Haddadi; X. V. Suo; S. Adhikary; P. Dianat; R. Chevallier; A. M. Hoang; A. Dehzangi

doi:10.1117/12.2228611

20 May 2016 High-performance short-wavelength infrared photodetectors based on type-II InAs/InAs1-xSbx/AlAs1-xSbx superlattices

M. Razeghi, A. Haddadi, X. V. Suo, S. Adhikary, P. Dianat, R. Chevallier, A. M. Hoang, A. Dehzangi

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Proceedings Volume 9819, Infrared Technology and Applications XLII; 98190A (2016) https://doi.org/10.1117/12.2228611
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

Abstract

We present a high-performance short-wavelength infrared n-i-p photodiode, whose structure is based on type-II superlattices with InAs/InAs_1-xSb_x/AlAs_1-xSb_x on GaSb substrate. At room temperature (300K) with front-side illumination, the device shows the peak responsivity of 0.47 A/W at 1.6mm, corresponding to 37% quantum efficiency at zero bias. At 300K, the device has a 50% cut-off wavelength of ~1.8mm. For −50mV applied bias at 300 K the photodetector has dark current density of 9.6x10^-5 A/cm² and RxA of 285 Ω•cm², and it revealed a detectivity of 6.45x10¹⁰ cm•Hz^1/2/W. Dark current density reached to 1.3x10^-8 A/cm² at 200 K, with 36% quantum efficiency which leads to the detectivity value of 5.66x10¹² cm•Hz^1/2/W.

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M. Razeghi, A. Haddadi, X. V. Suo, S. Adhikary, P. Dianat, R. Chevallier, A. M. Hoang, and A. Dehzangi "High-performance short-wavelength infrared photodetectors based on type-II InAs/InAs1-xSbx/AlAs1-xSbx superlattices", Proc. SPIE 9819, Infrared Technology and Applications XLII, 98190A (20 May 2016); https://doi.org/10.1117/12.2228611

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