Graphene-based van der Waals heterostructures towards a new type of terahertz quantum-cascade lasers

Takayuki Watanabe, Deepika Yadav, Stephane Albon Boubanga Tombet, Akira Satou, Alexander A. Dubinov, Victor Ryzhii, Taiichi Otsuji

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Current-injection pumping in graphene makes carrier population inversion enabling lasing and/or amplification of terahertz (THz) radiation. We have recently demonstrated single-mode THz lasing at 100K in graphene-channel transistor laser structures. Introduction of a gated double-graphene-layered (G-DGL) van der Waals heterostructure is a promising route to further increase the operation temperature and radiation intensity via plasmon- and/or photon-assisted quantummechanical tunneling. We have proposed a cascading of the G-DGL unit element working as a new type of THz quantumcascade lasers. Numerical analyses demonstrate further increase of the quantum efficiency of THz lasing by orders of magnitude compared to a transistor or single G-DGL structure.

Original languageEnglish
Title of host publicationTerahertz Emitters, Receivers, and Applications X
EditorsManijeh Razeghi, Alexei N. Baranov, Miriam S. Vitiello
ISBN (Electronic)9781510629417
Publication statusPublished - 2019
EventTerahertz Emitters, Receivers, and Applications X 2019 - San Diego, United States
Duration: 2019 Aug 112019 Aug 13

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceTerahertz Emitters, Receivers, and Applications X 2019
Country/TerritoryUnited States
CitySan Diego


  • Grapheme
  • Laser
  • Plasmon
  • Quantum cascade lasers
  • Terahertz
  • Tunneling
  • Van der Waals heterostructure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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