Electrically switchable in-plane anisotropic exciton-polariton in a van der Waal semiconductor

ORAL

Abstract

Tailoring of the propagation dynamics of exciton-polaritons in two-dimensional quantum materials has shown extraordinary promise to enable nanoscale control of electromagnetic fields. Varying permittivities along crystal directions within layers of material systems, can lead to an in-plane anisotropic dispersion of polaritons. Exploiting this physics as a control strategy for manipulating the directional propagation of the polaritons is desired and remains elusive. Here, we explore the in-plane anisotropic exciton-polariton propagation in a group-IV monochalcogenide semiconductor which forms ferroelectric domains and exhibits room-temperature excitonic behavior. Exciton-polaritons with their propagation dynamics and dispersion studied. This propagation of exciton-polaritons allows for nanoscale imaging of the in-plane ferroelectric domains. Finally, we demonstrate the electric switching of the exciton-polaritons in the ferroelectric domains of this complex vdW system. The study suggests that systems like group-IV monochalcogenides could serve as excellent ferroic platforms for actively reconfigurable polaritonic optical devices.

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Publication: Submitted manuscript

Presenters

  • Yue Luo

    • Harvard University

Authors

  • Yue Luo

    • Harvard University

  • Nannan Mao

    • Massachusetts Institute of Technology

  • Dapeng Ding

    • Harvard University

  • Ming-Hui Chiu

    • Massachusetts Institute of Technology

  • Xiang Ji

    • Massachusetts Institute of Technology

  • 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

  • Vincent Tung

    • King Abdullah University of Science and Technology

  • Hongkun Park

    • Harvard University

  • Philip Kim

    • Harvard University

  • Jing Kong

    • Massachusetts Institute of Technology

  • William L Wilson

    • Harvard University