Voltage-tunable terahertz and infrared photodetectors based on double-graphene-layer structures

V. Ryzhii, T. Otsuji, V. Ya Aleshkin, A. A. Dubinov, M. Ryzhii, V. Mitin, M. S. Shur

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


We propose and theoretically substantiate the concept of terahertz and infrared photodetectors using the resonant radiative transitions between graphene layers (GLs) in double-GL structures. The calculated absorption spectrum and the spectral characteristics of the photodetector responsivity exhibit sharp resonant maxima at the photon energies in a wide range. The resonant maxima can be tuned by the applied voltage. We compare the photodetector responsivity with that of the GL p-i-n photodiodes and quantum-well infrared photodetectors. Weak temperature dependences of the photocurrent and dark current enable the effective operation of the proposed photodetector at room temperature.

Original languageEnglish
Article number163505
JournalApplied Physics Letters
Issue number16
Publication statusPublished - 2014 Apr 21

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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