Plasmons in a Square of Two-Dimensional Electrons

Microwave absorption spectra of a single square of two-dimensional electrons (2DES) have been investigated using an optical detection technique. Fundamental dipole and harmonic quadrupole plasmon modes have been identified and compared to those in the disk geometry. In the square-shaped 2DES, a stro...

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Bibliographic Details
Published in:arXiv.org 2022-12
Main Authors: Zarezin, A M, Mylnikov, D, Petrov, A S, Svintsov, D, Gusikhin, P A, Kukushkin, I V, Muravev, V M
Format: Article
Language:English
Subjects:
Absorption spectra
Dipoles
Electrons
Microwave absorption
Plasmons
Quadrupoles
Strong interactions (field theory)
Online Access:Get full text
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Summary:Microwave absorption spectra of a single square of two-dimensional electrons (2DES) have been investigated using an optical detection technique. Fundamental dipole and harmonic quadrupole plasmon modes have been identified and compared to those in the disk geometry. In the square-shaped 2DES, a strong interaction is discovered between the neighboring plasmon modes, whereas no such hybridization is observed in the disk-shaped geometry. We establish a rigid theoretical platform to analytically describe the magneto-optical response of confined two-dimensional systems. The developed theory provides a proper description of the obtained experimental results.
ISSN:2331-8422
DOI:10.48550/arxiv.2212.10298