Probing superconducting plasmonics with Josephson junction spectroscopy

ORAL

Abstract

Recent discoveries of novel electronic states in two-dimensional (2D) materials have sparked significant research interest. However, spectroscopic studies of these systems face major challenges due to their small device dimensions, low operating temperatures, and encapsulation requirements. In this talk, we present one spectroscopy technique that exploits Josephson radiation in the millimeter-wave frequency range. Our probe operates at the base temperature of a dilution refrigerator and can be readily integrated with 2D material platforms. Using this technique, we have observed superconducting acoustic plasmons in high kinetic inductance superconducting bilayer systems. I will also discuss the potential for coupling these superconducting acoustic plasmons to graphene to study the cavity electrodynamics of the heterostructure.

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Presenters

  • Luojia Zhang

    • Cornell University

Authors

  • Luojia Zhang

    • Cornell University

  • Andrew Pierce

    • Cornell University

  • Simon Reinhardt

    • Cornell University

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Valla Fatemi

    • Cornell University