Recent trends in 8–14 μm type-II superlattice infrared detectors

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 to which they limit the performance of HOT LWIR T2SLs detectors and strategies for mitigating these limitations are explicated.