Graphene on a dielectric-defined superlattice: A versatile plasmonics platform

ORAL

Abstract

The Dirac-cone shaped electronics band structure of graphene can be engineered into various geometries by a superlattice potential. Compared to moiré superlattices that happen naturally at a van der Waals interface, dielectric-defined superlattice has the advantage of a wider range of available superlattice pattern symmetries and on-chip tunability of modulation strength. We achieved, experimentally, a similar dielectric-defined superlattice modulation to plasmonic band structure on graphene. An anisotropic plasmonic band gap is opened at mid-infrared frequency, allowing the use of such a device as a tunable plasmonic switch. Furthermore, it has been theoretically predicted that a graphene-1DSL system with ~600nm pitch hosts a plasmonic band gap in the terahertz (THz) regime, and graphene-1DSL with pitch ~75nm can produces Bloch oscillations that may act as a THz emitter. Experimental results on these systems will be reported.

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Publication: Xiong, L., Li, Y., Jung, M., Forsythe, C., Zhang, S., McLeod, A. S., Dong, Y., Liu, S., Ruta, F. L., Li, C., Watanabe, K., Taniguchi, T., Fogler, M. M., Edgar, J. H., Shvets, G., Dean, C. R., & Basov, D. N. (2021). Programmable Bloch Polaritons in graphene. Science Advances, 7(19). https://doi.org/10.1126/sciadv.abe8087

Presenters

  • Yutao Li

    • Columbia University

Authors

  • Yutao Li

    • Columbia University

  • Lin Xiong

    • Columbia University
    • Columbia Univ

  • Minwoo Jung

    • Cornell University

  • Carlos Forsythe

    • Columbia University

  • Shuai Zhang

    • Columbia University
    • Department of Physics, Columbia University, New York, NY, USA

  • Alexander S McLeod

    • University of Minnesota
    • Columbia University

  • Yinan Dong

    • Columbia University

  • Song Liu

    • Columbia University

  • Frank L Ruta

    • Columbia University

  • Casey Li

    • Columbia University

  • Suheng Xu

    • Columbia University

  • Ran Jing

    • Columbia University

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto Univ
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science
    • Kyoto University
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • National Institute For Materials Science
    • NIMS
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Michael M Fogler

    • University of California, San Diego

  • James H Edgar

    • Kansas State University
    • Kansas Stae University

  • Cory R Dean

    • Columbia Univ
    • Columbia University

  • Dmitri N Basov

    • Columbia University
    • Department of Physics, Columbia University, New York, NY, USA