Emission and propagation of hyperbolic phonon polaritons in hexagonal boron nitride

ORAL

Abstract

Using scattering-type scanning near-field optical microscope (s-SNOM), we studied various kinds of emission and propagation of hyperbolic phonon polaritons (HP2s) in hexagonal boron nitride (hBN). The systematic study via real-space nano-imaging reveals the emission mechanisms and propagating properties of HP2s excited by crystal edges, artificial structures, surface defects and impurities. Compared with traditional s-SNOM tip emitter, the polaritons from new emitters reported in this work possess longer propagation length and can be artificially manipulated on the hBN surface. Our work may benefit the future applications and engineering of HP2s using convenient emitters which are analogous to collective modes in other materials.

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Authors

  • Siyuan Dai

    • University of California, San Diego

  • Qiong Ma

    • Massachusetts Institute of Technology

  • Yafang Yang

    • Massachusetts Institute of Technology

  • Jeremy Rosenfeld

    • University of California, San Diego

  • Michael Goldflam

    • University of California, San Diego

  • Alex McLeod

    • University of California, San Diego

  • Trond Andersen

    • Massachusetts Institute of Technology

  • Zhe Fei

    • University of California, San Diego

  • Mengkun Liu

    • University of California, San Diego

  • Zhiyuan Sun

    • University of California, San Diego

  • Yinming Shao

    • University of California, San Diego

  • Kenji Watanabe

    • National Institute for Materials Science, Japan

  • Takashi Taniguchi

    • National Institute for Materials Science, Japan

  • Mark Thiemens

    • University of California, San Diego

  • Fritz Keilmann

    • Ludwig-Maximilians-Universität and Center for Nanoscience

  • Pablo Jarillo-Herrero

    • Massachusetts Institute of Technology

  • Michael Fogler

    • University of California, San Diego

  • D. N. Basov

    • University of California, San Diego