Mid-Wavelength Infrared nBn for HOT Detectors
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- Rogalski, A. & Martyniuk, P. Journal of Elec Materi (2014) 43: 2963. doi:10.1007/s11664-014-3161-y
Recently, new strategies to achieve high-operating-temperature (HOT) detectors have been proposed, including barrier structures such as nBn devices, unipolar barrier photodiodes, alternative materials such as superlattices, and multistage (cascade) infrared devices. In the case of nBn detectors, the barriers must be correctly engineered and correctly located in the device structure to achieve optimal performance. This paper presents the limitations of barrier unipolar devices and the progress in their development for HOT operation in the mid-wavelength infrared range. Their performance is compared with state-of-the-art HgCdTe photodiodes.
KeywordsUnipolar barrier detectors nBn detectors InAsSb ternary alloy InAs/GaSb type II superlattices HgCdTe photodetectors
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