Hyperbolicity on-demand in van der Waals Semiconductors

ORAL

Abstract

Strong anisotropy is inherent to natrually layered van der Waals (vdW) materials. Consequentially, dipole active resonances can render the principle values of the dielectric tensor of opposite sign along orthogonal crystallographic directions within naturally occurring vdW materials. Chief among the resultant non-intuitive optical properties is the formation of sub-diffractional wavepackets that travel as conical rays with hyperbolic dispersion throughout their bulk. Here, I discuss our work on producing an on-demand hyperbolic response within the vdW semiconductor WSe2. By utilizing femtosecond photoexcitation to inject electron-hole pairs in WSe2 we dramatically altered its electronic response. Our time-resolved nano-imaging data reveals key signatures of hyperbolicity produced on-demand, which appear on the sub-picosecond timescale.

*Programmable Quantum Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), under award DE-SC0019443; the European Research Council (ERC-2015-AdG694097); the Cluster of Excellence ‘Advanced Imaging of Matter’ (AIM); and the Flatiron Institute, a division of the Simons Foundation. S. L. acknowledges the Alexander von Humboldt foundation. D.N.B. is the Vannevar Bush Faculty Fellow (N00014-19-1-2630).

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Presenters

  • Aaron Sternbach

    • Department of Physics, Columbia University
    • Columbia University
    • Columbia Univ

Authors

  • Aaron Sternbach

    • Department of Physics, Columbia University
    • Columbia University
    • Columbia Univ

  • Sang Hoon Chae

    • Columbia University

  • Simone Latini

    • Max Planck Institute for the Structure and Dynamics of Matter

  • Andrey Rikhter

    • UC San Diego
    • University of California, San Diego

  • Yinming Shao

    • Department of Physics, Columbia University
    • Columbia Univ
    • Columbia University

  • Baichang Li

    • Department of Mechanical Engineering, Columbia University
    • Columbia University

  • Daniel Rhodes

    • Physics, University of Wisconsin - Madison
    • Physics, Columbia University
    • Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin-Madison

  • Brian Sae Yoon Kim

    • Columbia University

  • P. James Schuck

    • Mechanical Engineering, Columbia University
    • Columbia University
    • Department of Mechanical Engineering, Columbia University

  • Xiaodong Xu

    • Physics, University of Washington
    • Department of Physics, University of Washington
    • University of Washington
    • Department of Physics, University of Washington, Seattle
    • University of Washington, Seattle

  • Xiaoyang Zhu

    • Columbia University
    • Chemistry, Columbia university
    • Chemistry, Columbia University
    • Department of Chemistry, Columbia University

  • Richard Averitt

    • University of California, San Diego
    • University of California San Diego
    • UC San Diego
    • Physics, University of California San Diego
    • Department of Physics, University of California, San Diego
    • University of California

  • James Hone

    • Columbia Univ
    • Columbia University
    • Department of Mechanical Engineering, Columbia University
    • Mechanical Engineering, Columbia University

  • Michael Fogler

    • University of California, San Diego
    • Department of Physics, University of California San Diego
    • UC San Diego
    • Department of Physics, University of California, San Diego
    • UCSD
    • University of California San Diego

  • Angel Rubio

    • Max Plank Institute for the Structure and Dynamics of Matter; Center for Computational Quantum Physics Flatiron Institute
    • Max Planck Institute for the Structure and Dynamics of Matter
    • Theory, Max Planck Institute for the Structure and Dynamics of Matter
    • Max Planck Inst Structure & Dynamics of Matter
    • Physics, Max Planck Institute
    • Max Planck Institute for Structure and Dynamics of Matter and Center for Free-Electron Laser Science
    • Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science, 22761 Hamburg, Germany
    • Max Planck Institute for the Structure and Dynamics of Matter and Center Free-Electron Laser Science, Hamburg, Germany
    • Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
    • MPSD Hamburg
    • Max Planck Institute
    • Max Planck Inst Structure & Dynamics of Matter; Center for Computational Quantum Physics Flatiron Institute, Simons Foundation NY, USA
    • Theory, Max Planck Inst Structure & Dynamics of Matter

  • Dmitri Basov

    • Columbia University
    • Department of Physics, Columbia University
    • Physics, Columbia University
    • Columbia Univ