• 文献标题:   Voltage-tunable terahertz and infrared photodetectors based on double-graphene-layer structures
  • 文献类型:   Article
  • 作  者:   RYZHII V, OTSUJI T, ALESHKIN VY, DUBINOV AA, RYZHII M, MITIN V, SHUR MS
  • 作者关键词:  
  • 出版物名称:   APPLIED PHYSICS LETTERS
  • ISSN:   0003-6951 EI 1077-3118
  • 通讯作者地址:   Tohoku Univ
  • 被引频次:   21
  • DOI:   10.1063/1.4873114
  • 出版年:   2014

▎ 摘  要

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. (C) 2014 AIP Publishing LLC.