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

Manijeh Razeghi*, Arash Dehzangi, Jiakai Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Type-II InAs/GaSb superlattices (T2SLs) has drawn a lot of attention 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, 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.

Original languageEnglish (US)
Article number100054
JournalResults in Optics
StatePublished - Jan 2021


  • Conduction band off-set
  • Detectivity
  • Quantum efficiency
  • Required operating bias
  • Triple-band SWIR-MWIR-LWIR photodetector
  • Type-II superlattice

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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