Multi-band SWIR-MWIR-LWIR Type-II superlattice based infrared photodetector

Multi-band SWIR-MWIR-LWIR Type-II superlattice based infrared photodetector

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Type-II InAs/GaSb superlattices (T2SLs) has drawn a lot of attention ds durga hand soap since it was introduced in 1970, especially for infrared detection as a system of multi-interacting quantum wells.In recent years, T2SL material system has experienced incredible improvements in material quality, device structure designs and device fabrication process, which elevated the performances of T2SL-based photo-detectors to a comparable level to the state-of-the-art material systems for infrared detection such as Mercury Cadmium Telluride (MCT).As a pioneer in the field, center for quantum devices (CQD) has been involved in growth, design, deva curl arc angel characterization, and introduction of T2SL material system for infrared photodetection.In this review paper, we will present the latest development of bias-selectable multi-band infrared photodetectors at the CQD, based on InAs/GaSb/AlSb and InAs/InAs1-xSbx type-II superlattice.