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Directional Plasmonic Excitation by Helical Nanotips

The phenomenon of coupling between light and surface plasmon polaritons requires specific momentum matching conditions. In the case of a single scattering object on a metallic surface, such as a nanoparticle or a nanohole, the coupling between a broadband effect, i.e., scattering, and a discrete one...

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Detalles Bibliográficos
Autores principales: Singh, Leeju, Maccaferri, Nicolò, Garoli, Denis, Gorodetski, Yuri
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8158748/
https://www.ncbi.nlm.nih.gov/pubmed/34069339
http://dx.doi.org/10.3390/nano11051333
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author Singh, Leeju
Maccaferri, Nicolò
Garoli, Denis
Gorodetski, Yuri
author_facet Singh, Leeju
Maccaferri, Nicolò
Garoli, Denis
Gorodetski, Yuri
author_sort Singh, Leeju
collection PubMed
description The phenomenon of coupling between light and surface plasmon polaritons requires specific momentum matching conditions. In the case of a single scattering object on a metallic surface, such as a nanoparticle or a nanohole, the coupling between a broadband effect, i.e., scattering, and a discrete one, such as surface plasmon excitation, leads to Fano-like resonance lineshapes. The necessary phase matching requirements can be used to engineer the light–plasmon coupling and to achieve a directional plasmonic excitation. Here, we investigate this effect by using a chiral nanotip to excite surface plasmons with a strong spin-dependent azimuthal variation. This effect can be described by a Fano-like interference with a complex coupling factor that can be modified thanks to a symmetry breaking of the nanostructure.
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spelling pubmed-81587482021-05-28 Directional Plasmonic Excitation by Helical Nanotips Singh, Leeju Maccaferri, Nicolò Garoli, Denis Gorodetski, Yuri Nanomaterials (Basel) Article The phenomenon of coupling between light and surface plasmon polaritons requires specific momentum matching conditions. In the case of a single scattering object on a metallic surface, such as a nanoparticle or a nanohole, the coupling between a broadband effect, i.e., scattering, and a discrete one, such as surface plasmon excitation, leads to Fano-like resonance lineshapes. The necessary phase matching requirements can be used to engineer the light–plasmon coupling and to achieve a directional plasmonic excitation. Here, we investigate this effect by using a chiral nanotip to excite surface plasmons with a strong spin-dependent azimuthal variation. This effect can be described by a Fano-like interference with a complex coupling factor that can be modified thanks to a symmetry breaking of the nanostructure. MDPI 2021-05-19 /pmc/articles/PMC8158748/ /pubmed/34069339 http://dx.doi.org/10.3390/nano11051333 Text en © 2021 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
Singh, Leeju
Maccaferri, Nicolò
Garoli, Denis
Gorodetski, Yuri
Directional Plasmonic Excitation by Helical Nanotips
title Directional Plasmonic Excitation by Helical Nanotips
title_full Directional Plasmonic Excitation by Helical Nanotips
title_fullStr Directional Plasmonic Excitation by Helical Nanotips
title_full_unstemmed Directional Plasmonic Excitation by Helical Nanotips
title_short Directional Plasmonic Excitation by Helical Nanotips
title_sort directional plasmonic excitation by helical nanotips
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8158748/
https://www.ncbi.nlm.nih.gov/pubmed/34069339
http://dx.doi.org/10.3390/nano11051333
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AT garolidenis directionalplasmonicexcitationbyhelicalnanotips
AT gorodetskiyuri directionalplasmonicexcitationbyhelicalnanotips