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

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

doi:10.1117/12.2529016

6 September 2019 Graphene-based van der Waals heterostructures towards a new type of terahertz quantum-cascade lasers

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

Author Affiliations +

Proceedings Volume 11124, Terahertz Emitters, Receivers, and Applications X; 1112406 (2019) https://doi.org/10.1117/12.2529016
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

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.

Citation Download Citation

Takayuki Watanabe, Deepika Yadav, Stephane Boubanga Tombet, Akira Satou, Alexander A. Dubinov, Victor Ryzhii, and Taiichi Otsuji "Graphene-based van der Waals heterostructures towards a new type of terahertz quantum-cascade lasers", Proc. SPIE 11124, Terahertz Emitters, Receivers, and Applications X, 1112406 (6 September 2019); https://doi.org/10.1117/12.2529016

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