Recent trends in 8–14 μm type-II superlattice infrared detectors
نویسندگان
چکیده
Type-II superlattices (T2SLs) hold enormous potential for 8 – 14μm long-wavelength infrared (LWIR) photodetection at high operating temperature (HOT). This review highlights recent developments towards HOT applications. Minority carrier lifetime and diffusion length of T2SLs are examined to appraise the extent which they limit performance LWIR detectors strategies mitigating these limitations explicated. (a) Collected values external quantum efficiency Vs active region thickness (2018–2020) T2SL MCT (b) minority lifetimes cut wavelength Ga-free Ga-containing MCT. • Summary fundamental physics underpinning type-II superlattice infrared. Detectors relevant metrics. Overview current state-of-the-art type-II. Superlattices vs HgCdTe detectors. Investigation into limiting mechanisms future mitigations. Sampling enhancing techniques. next-generation 14 μm use The inherit flexibility material system has enabled incorporation unipolar barriers eliminate generation-recombination currents enhance device performance. In addition suppressed Auger recombination tunneling currents, this led sustained research interest in over past several decades. For reasons, theoretically predicted outperform Mercury Cadmium Telluride (MCT) provides an overview some Recent studies on Strategies also
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ژورنال
عنوان ژورنال: Infrared Physics & Technology
سال: 2021
ISSN: ['1350-4495', '1879-0275']
DOI: https://doi.org/10.1016/j.infrared.2021.103756