Comparison of intersubband quantum-well and interband graphene-layer infrared photodetectors

Victor Ryzhii, Taichi Otsuji, Valery E. Karasik, Maxim Ryzhii, Vladimir G. Leiman, Vladimir Mitin, Michael S. Shur

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We compare the characteristics of the intersubband quantum-well infrared photodetectors (QWIPs) based on the traditional semiconductor materials and the interband graphene-layer infrared photodetectors (GLIPs) based on van der Waals heterostructures. We show that the responsivity and dark-current-limited detectivity of GLIPs exceed those of QWIPs. This is because of a stronger radiation interband absorption in the GLs, a smaller capture probability of electrons into the GLs, and a higher activation energy of the electron thermionic and tunneling escape from the GLs in comparison with those in the QWs.

Original languageEnglish
Article number4000108
JournalIEEE Journal of Quantum Electronics
Issue number2
Publication statusPublished - 2018 Apr


  • Graphene
  • Infrared photodetector
  • Quantum well
  • Van der Waals heterostructure


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