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Full three-dimensional Poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles

The Poynting vector plays a key role in electrodynamics as it is directly related to the power and the momentum carried by an electromagnetic wave. Based on the Lorenz-Mie theory, we report on the focusing effect of a spherical particle-lens by properly analysing the Poynting vector maps. Convention...

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Autores principales: Yue, Liyang, Yan, Bing, Monks, James N., Dhama, Rakesh, Jiang, Chunlei, Minin, Oleg V., Minin, Igor V., Wang, Zengbo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6934590/
https://www.ncbi.nlm.nih.gov/pubmed/31882944
http://dx.doi.org/10.1038/s41598-019-56761-9
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author Yue, Liyang
Yan, Bing
Monks, James N.
Dhama, Rakesh
Jiang, Chunlei
Minin, Oleg V.
Minin, Igor V.
Wang, Zengbo
author_facet Yue, Liyang
Yan, Bing
Monks, James N.
Dhama, Rakesh
Jiang, Chunlei
Minin, Oleg V.
Minin, Igor V.
Wang, Zengbo
author_sort Yue, Liyang
collection PubMed
description The Poynting vector plays a key role in electrodynamics as it is directly related to the power and the momentum carried by an electromagnetic wave. Based on the Lorenz-Mie theory, we report on the focusing effect of a spherical particle-lens by properly analysing the Poynting vector maps. Conventional two-dimensional (2D) maps showing Poynting vector magnitude and direction in a given plane cannot deliver information on three-dimensional (3D) directivity and vectorisation in key regions of singularities, such as vortexes and saddle points, due to poor expressiveness. In this article, an analytical 3D mapping technology is utilised to track the field-features passing through the singularities of the distribution of the Poynting vector in a spherically dielectric mesoscale particle-lens. We discovered that the spheres with the certain size parameters can stimulate extremely large field-intensity at singularities and then form two circular hotspots around the sphere poles. An astonishing large ‘heart-shape’ 3D Poynting vector circulation, which cannot be predicted by conventional 2D mapping analysis, is found to provide a great angular variation within an enormous range in these spheres. We anticipate that this effect will contribute to the field-enhancement phenomena, such as surface enhances Raman scattering, surface enhances absorption, super-resolution imaging and others.
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spelling pubmed-69345902019-12-29 Full three-dimensional Poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles Yue, Liyang Yan, Bing Monks, James N. Dhama, Rakesh Jiang, Chunlei Minin, Oleg V. Minin, Igor V. Wang, Zengbo Sci Rep Article The Poynting vector plays a key role in electrodynamics as it is directly related to the power and the momentum carried by an electromagnetic wave. Based on the Lorenz-Mie theory, we report on the focusing effect of a spherical particle-lens by properly analysing the Poynting vector maps. Conventional two-dimensional (2D) maps showing Poynting vector magnitude and direction in a given plane cannot deliver information on three-dimensional (3D) directivity and vectorisation in key regions of singularities, such as vortexes and saddle points, due to poor expressiveness. In this article, an analytical 3D mapping technology is utilised to track the field-features passing through the singularities of the distribution of the Poynting vector in a spherically dielectric mesoscale particle-lens. We discovered that the spheres with the certain size parameters can stimulate extremely large field-intensity at singularities and then form two circular hotspots around the sphere poles. An astonishing large ‘heart-shape’ 3D Poynting vector circulation, which cannot be predicted by conventional 2D mapping analysis, is found to provide a great angular variation within an enormous range in these spheres. We anticipate that this effect will contribute to the field-enhancement phenomena, such as surface enhances Raman scattering, surface enhances absorption, super-resolution imaging and others. Nature Publishing Group UK 2019-12-27 /pmc/articles/PMC6934590/ /pubmed/31882944 http://dx.doi.org/10.1038/s41598-019-56761-9 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yue, Liyang
Yan, Bing
Monks, James N.
Dhama, Rakesh
Jiang, Chunlei
Minin, Oleg V.
Minin, Igor V.
Wang, Zengbo
Full three-dimensional Poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles
title Full three-dimensional Poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles
title_full Full three-dimensional Poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles
title_fullStr Full three-dimensional Poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles
title_full_unstemmed Full three-dimensional Poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles
title_short Full three-dimensional Poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles
title_sort full three-dimensional poynting vector flow analysis of great field-intensity enhancement in specifically sized spherical-particles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6934590/
https://www.ncbi.nlm.nih.gov/pubmed/31882944
http://dx.doi.org/10.1038/s41598-019-56761-9
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