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Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle

We use a dielectric-response formalism to compute the induced charge density and the induced potential in a conductive two-dimensional (2D) material, traversed by a charged particle that moves on a perpendicular trajectory with constant velocity. By analyzing the electric force on the material via t...

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Detalles Bibliográficos
Autores principales: Marks, Gareth Arturo, Blankespoor, Devin, Miskovic, Zoran L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921502/
https://www.ncbi.nlm.nih.gov/pubmed/36770155
http://dx.doi.org/10.3390/ma16031150
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author Marks, Gareth Arturo
Blankespoor, Devin
Miskovic, Zoran L.
author_facet Marks, Gareth Arturo
Blankespoor, Devin
Miskovic, Zoran L.
author_sort Marks, Gareth Arturo
collection PubMed
description We use a dielectric-response formalism to compute the induced charge density and the induced potential in a conductive two-dimensional (2D) material, traversed by a charged particle that moves on a perpendicular trajectory with constant velocity. By analyzing the electric force on the material via the Maxwell stress tensor, we showed that the polarization of the material can be decomposed into a conservative part related to the dynamic image force, and a dissipative part describing the energy and momentum transfer to the material, which is ultimately responsible for launching the plasma oscillation waves in the material. After showing that the launching dynamics is fully determined by the Loss function of the material, we used a conductivity model suitable for the terahertz to the midinfrared frequency range, which includes both the intraband and interband electron transitions in the material, to compute the real-space and time animations of the propagating plasma waves in the plane of the material. Finally, we used a stationary phase analysis to show that the plasmon wave crests go into an overdamped regime at large propagation distances, which are comparable to the distances where retardation effects are expected to emerge due to hybridization of the plasmon dispersion with the light line at long wavelengths.
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spelling pubmed-99215022023-02-12 Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle Marks, Gareth Arturo Blankespoor, Devin Miskovic, Zoran L. Materials (Basel) Article We use a dielectric-response formalism to compute the induced charge density and the induced potential in a conductive two-dimensional (2D) material, traversed by a charged particle that moves on a perpendicular trajectory with constant velocity. By analyzing the electric force on the material via the Maxwell stress tensor, we showed that the polarization of the material can be decomposed into a conservative part related to the dynamic image force, and a dissipative part describing the energy and momentum transfer to the material, which is ultimately responsible for launching the plasma oscillation waves in the material. After showing that the launching dynamics is fully determined by the Loss function of the material, we used a conductivity model suitable for the terahertz to the midinfrared frequency range, which includes both the intraband and interband electron transitions in the material, to compute the real-space and time animations of the propagating plasma waves in the plane of the material. Finally, we used a stationary phase analysis to show that the plasmon wave crests go into an overdamped regime at large propagation distances, which are comparable to the distances where retardation effects are expected to emerge due to hybridization of the plasmon dispersion with the light line at long wavelengths. MDPI 2023-01-29 /pmc/articles/PMC9921502/ /pubmed/36770155 http://dx.doi.org/10.3390/ma16031150 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Marks, Gareth Arturo
Blankespoor, Devin
Miskovic, Zoran L.
Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle
title Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle
title_full Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle
title_fullStr Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle
title_full_unstemmed Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle
title_short Launching Plasmons in a Two-Dimensional Material Traversed by a Fast Charged Particle
title_sort launching plasmons in a two-dimensional material traversed by a fast charged particle
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921502/
https://www.ncbi.nlm.nih.gov/pubmed/36770155
http://dx.doi.org/10.3390/ma16031150
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