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  • Letter

Anomalous retardation of relativistic plasmons: Microwave response of a gated two-dimensional electron system

A. M. Zarezin1,2,*, V. M. Muravev1,*, P. A. Gusikhin1, A. A. Zabolotnykh3, V. A. Volkov3, and I. V. Kukushkin1

  • 1Institute of Solid State Physics, RAS, Chernogolovka, 142432 Russia
  • 2Moscow Institute of Physics and Technology, Dolgoprudny, 141700 Russia
  • 3Kotelnikov Institute of Radio-engineering and Electronics of the RAS, Mokhovaya 11-7, Moscow 125009, Russia

  • *These authors contributed equally to this work.
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Phys. Rev. B 105, L041403 – Published 10 January, 2022

DOI: https://doi.org/10.1103/PhysRevB.105.L041403

Abstract

We investigate the microwave response of a gated two-dimensional electron system (2DES) loaded by an external on-chip resonator. We find the system response to be dominated by the excitation of relativistic plasmons. These plasmons exhibit anomalously strong coupling to the photon mode of the resonator, which manifests itself in a drastic reduction of the plasma resonant frequency and linewidth. We develop an analytical approach to explain the observed phenomenon of strong interaction of 2D plasma with light. The theory turned out to be in good agreement with the experiment.

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Phys. Rev. B 105, L041403– Published 10 January, 2022
  • Received 4 November 2021
  • Accepted 17 December 2021
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