Email this article Electrodynamic approach for calculating the absorption spectra of plasmons in a rectangle with a two-dimensional electron gas excited by an incident electromagnetic wave
- Authors: Fateev D.V.1, Mashinsky K.V.1
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Affiliations:
- Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
- Issue: Vol 32, No 3 (2024)
- Pages: 347-356
- Section: Innovations in applied physics
- URL: https://journals.rcsi.science/0869-6632/article/view/256162
- DOI: https://doi.org/10.18500/0869-6632-003100
- EDN: https://elibrary.ru/RRNDFW
- ID: 256162
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Abstract
The purpose of this research is to develop an electrodynamic method for calculating the plasmon spectrum in a three-dimensional structure with a two-dimensional electron gas excited by an incident electromagnetic wave. Methods. The developed method is based on solving integral equations formed with respect to induced currents in the conducting parts of a three-dimensional structure. Results. The convergence of the method and the calculation time were studied. The conditions for the convergence of calculations of higher plasmon resonances in a rectangular structure with a two-dimensional electron gas are determined. The normal incidence of an arbitrarily polarized electromagnetic wave on a rectangle with a two-dimensional gas is studied. The spectra of the absorption, extinction, forward and back scattering cross sections of the incident wave are calculated. Conclusion. It is found that in a rectangular structure containing a two-dimensional electron gas, the spectrum of plasmon resonances is modified in comparison with established by two-dimensional models of problem formulation, in which the structure is assumed to be infinite and homogeneous in one of the directions. It has been established that the incident wave most effectively excites fundamental plasmon modes. Plasmonic modes exhibit strong charge accumulation at the edges of the rectangle, which significantly affects the resonant excitation frequencies of plasmonic modes.
About the authors
Denis Vasil'evich Fateev
Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
ORCID iD: 0000-0003-1406-5385
SPIN-code: 6228-0865
Scopus Author ID: 17433978100
ResearcherId: K-2579-2012
ul. Zelyonaya, 38, Saratov, 410019, Russia
Konstantin Viktorivich Mashinsky
Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
ORCID iD: 0000-0002-0724-6391
SPIN-code: 9386-1966
Scopus Author ID: 56471874400
ResearcherId: F-1610-2017
ul. Zelyonaya, 38, Saratov, 410019, Russia
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