Terahertz spectroscopy of the metal insulator transition in vanadium dioxide

ORAL

Abstract

We employ terahertz spectroscopy to study the metal-insulator phase transition in vanadium dioxide (VO$_2$ ). We measure the terahertz frequency conductivity in the metallic phase that has a real conductivity of 1000 $\Omega^{-1}~\mathrm{cm}^{-1}$ and a negligible imaginary conductivity. The observed conductivity dynamics are consistent with a photoinduced transition in spatially inhomogeneous regions of the film, followed by a thermally driven transition to the maximum conductivity.

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Authors

  • David Hilton

    • Los Alamos National Laboratory

  • Rohit Prasankumar

    • Los Alamos National Laboratory

  • Andrea Cavalleri

    • Oxford University

  • Sylvain Fourmaux

    • Universite du Quebec

  • Jean-Claude Kieffer

    • Universite du Quebec

  • Antoinette Taylor

    • Los Alamos National Laboratory
    • MST-CINT, Los Alamos National Laboratory

  • Richard Averitt

    • Los Alamos National Laboratory
    • Los Alamos National Lab