APS Logo

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.

–

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