Terahertz wave generation and detection in double-graphene layered van der Waals heterostructures

Deepika Yadav, Stephane Boubanga Tombet, Takayuki Watanabe, Stevanus Arnold, Victor Ryzhii, Taiichi Otsuji

研究成果: Article査読

38 被引用数 (Scopus)

抄録

We report on the first experimental observation of terahertz emission and detection in a double graphene layered (GL) heterostructure which comprises a thin hexagonal-boron nitride tunnel-barrier layer sandwiched between two separately contacted GLs. Inter-GL population inversion is induced by electrically biasing the structure. Resonant tunneling and negative differential resistance is expected when the two graphene band structures are perfectly aligned. However, in the case of small misalignments we demonstrate that the photon-absorption/emission-assisted non-resonant- and resonant-tunneling causes all excess charges in the n-type GL to recombine with the holes in the p-type GL giving rise to an increased measured dc current. This work highlights a novel strategy for the realization of efficient voltage-tunable terahertz emitters and detectors.

本文言語English
論文番号045009
ジャーナル2D Materials
3
4
DOI
出版ステータスPublished - 2016 10 14

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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