Dynamical terahertz spectroscopy of three-dimensional Dirac semimetal Cd<sub>3</sub>As<sub>2</sub>

ORAL

Abstract

Three-dimensional Dirac semimetal Cd3As2 has drawn attention for its extremely mobile carriers and unique infrared response. Moreover, Dirac semimetals, with symmetry protected Dirac nodes, are predicted to display novel low-frequency behavior that deviates from the conventional metal/semiconductor or a 2D Dirac semimetal picture. Nonlinearities of the low-energy terahertz response observed in Cd3As2 demand a holistic understanding. We probe the dynamical broadband terahertz response in this material upon photoexcitation and also discuss some terahertz nonlinear effects.

*This work was supported by ARO MURI Grant No. W911NF-16-1-0361

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Presenters

  • Varun Ramaprasad

    • University of California, San Diego
    • University of California San Diego

Authors

  • Varun Ramaprasad

    • University of California, San Diego
    • University of California San Diego

  • Yuan Zhang

    • University of California, San Diego

  • Alexander C Lygo

    • University of California Santa Barbara

  • Sheikh Rubaiat Ul Haque

    • University of California, San Diego

  • Kelson Kaj

    • University of California, San Diego

  • Susanne Stemmer

    • University of California, Santa Barbara

  • Richard D Averitt

    • University of California, San Diego