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Nature of the Poynting Vector Field Singularities in Resonant Light Scattering by Nanoparticles

Singularities of the Poynting vector field subwavelength patterns in resonant light scattering by nanoparticles are discussed and classified. There are two generic types of the singularities, namely, (i) the singularities related to the vanishing of the magnetic (and/or electric) field at the singul...

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Detalles Bibliográficos
Autores principales: Tribelsky, Michael I., Rubinstein, Boris Y.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182404/
https://www.ncbi.nlm.nih.gov/pubmed/35683735
http://dx.doi.org/10.3390/nano12111878
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author Tribelsky, Michael I.
Rubinstein, Boris Y.
author_facet Tribelsky, Michael I.
Rubinstein, Boris Y.
author_sort Tribelsky, Michael I.
collection PubMed
description Singularities of the Poynting vector field subwavelength patterns in resonant light scattering by nanoparticles are discussed and classified. There are two generic types of the singularities, namely, (i) the singularities related to the vanishing of the magnetic (and/or electric) field at the singular points and (ii) the singularities related to the formation of standing waves in proximity to the singular points. The connection of these types of singularities to the topology of the singular points, space dimension (3D vs. 2D), and energy conservation law are revealed. In particular, it is shown that in 2D cases in non-dissipative media, the energy conservation reduces the possible types of generic singular points to saddles and centers only. In 3D cases, a universal expression connecting different components of the Poynting vector and valid for any generic singularities is derived and numerically checked for various types of singular points.
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spelling pubmed-91824042022-06-10 Nature of the Poynting Vector Field Singularities in Resonant Light Scattering by Nanoparticles Tribelsky, Michael I. Rubinstein, Boris Y. Nanomaterials (Basel) Article Singularities of the Poynting vector field subwavelength patterns in resonant light scattering by nanoparticles are discussed and classified. There are two generic types of the singularities, namely, (i) the singularities related to the vanishing of the magnetic (and/or electric) field at the singular points and (ii) the singularities related to the formation of standing waves in proximity to the singular points. The connection of these types of singularities to the topology of the singular points, space dimension (3D vs. 2D), and energy conservation law are revealed. In particular, it is shown that in 2D cases in non-dissipative media, the energy conservation reduces the possible types of generic singular points to saddles and centers only. In 3D cases, a universal expression connecting different components of the Poynting vector and valid for any generic singularities is derived and numerically checked for various types of singular points. MDPI 2022-05-31 /pmc/articles/PMC9182404/ /pubmed/35683735 http://dx.doi.org/10.3390/nano12111878 Text en © 2022 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
Tribelsky, Michael I.
Rubinstein, Boris Y.
Nature of the Poynting Vector Field Singularities in Resonant Light Scattering by Nanoparticles
title Nature of the Poynting Vector Field Singularities in Resonant Light Scattering by Nanoparticles
title_full Nature of the Poynting Vector Field Singularities in Resonant Light Scattering by Nanoparticles
title_fullStr Nature of the Poynting Vector Field Singularities in Resonant Light Scattering by Nanoparticles
title_full_unstemmed Nature of the Poynting Vector Field Singularities in Resonant Light Scattering by Nanoparticles
title_short Nature of the Poynting Vector Field Singularities in Resonant Light Scattering by Nanoparticles
title_sort nature of the poynting vector field singularities in resonant light scattering by nanoparticles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182404/
https://www.ncbi.nlm.nih.gov/pubmed/35683735
http://dx.doi.org/10.3390/nano12111878
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