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Plasmonic Metalens to Generate an Airy Beam

Airy beams represent an important type of non-diffracting beams—they are the only non-diffracting wave in one dimension, and thus they can be produced with a cylindrical geometry that modifies a wavefront in one dimension. In this paper, we show the design of a cylindrical plasmonic metalens consist...

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Autores principales: Sosa-Sánchez, Citlalli T., Téllez-Limón, Ricardo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10537606/
https://www.ncbi.nlm.nih.gov/pubmed/37764605
http://dx.doi.org/10.3390/nano13182576
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author Sosa-Sánchez, Citlalli T.
Téllez-Limón, Ricardo
author_facet Sosa-Sánchez, Citlalli T.
Téllez-Limón, Ricardo
author_sort Sosa-Sánchez, Citlalli T.
collection PubMed
description Airy beams represent an important type of non-diffracting beams—they are the only non-diffracting wave in one dimension, and thus they can be produced with a cylindrical geometry that modifies a wavefront in one dimension. In this paper, we show the design of a cylindrical plasmonic metalens consisting of an array of nanoslits in a gold thin layer that modulates the phase of a Gaussian beam to generate an airy beam propagating in free space. Based on the numerical results, we show that it is possible to generate an airy beam by only matching the phase of wavefronts coming out from the array of gold nanoslits to the airy beam phase at plane [Formula: see text]. We numerically demonstrate that the airy beam exhibits bending over propagation and self-healing properties. The transmission efficiency is around 60%. The simplicity of the proposed structure open new perspectives in the design of flat metasurfaces for light-focusing applications.
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spelling pubmed-105376062023-09-29 Plasmonic Metalens to Generate an Airy Beam Sosa-Sánchez, Citlalli T. Téllez-Limón, Ricardo Nanomaterials (Basel) Communication Airy beams represent an important type of non-diffracting beams—they are the only non-diffracting wave in one dimension, and thus they can be produced with a cylindrical geometry that modifies a wavefront in one dimension. In this paper, we show the design of a cylindrical plasmonic metalens consisting of an array of nanoslits in a gold thin layer that modulates the phase of a Gaussian beam to generate an airy beam propagating in free space. Based on the numerical results, we show that it is possible to generate an airy beam by only matching the phase of wavefronts coming out from the array of gold nanoslits to the airy beam phase at plane [Formula: see text]. We numerically demonstrate that the airy beam exhibits bending over propagation and self-healing properties. The transmission efficiency is around 60%. The simplicity of the proposed structure open new perspectives in the design of flat metasurfaces for light-focusing applications. MDPI 2023-09-17 /pmc/articles/PMC10537606/ /pubmed/37764605 http://dx.doi.org/10.3390/nano13182576 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 Communication
Sosa-Sánchez, Citlalli T.
Téllez-Limón, Ricardo
Plasmonic Metalens to Generate an Airy Beam
title Plasmonic Metalens to Generate an Airy Beam
title_full Plasmonic Metalens to Generate an Airy Beam
title_fullStr Plasmonic Metalens to Generate an Airy Beam
title_full_unstemmed Plasmonic Metalens to Generate an Airy Beam
title_short Plasmonic Metalens to Generate an Airy Beam
title_sort plasmonic metalens to generate an airy beam
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10537606/
https://www.ncbi.nlm.nih.gov/pubmed/37764605
http://dx.doi.org/10.3390/nano13182576
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