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Enhanced Thermo-optical Response by Means of Anapole Excitation

[Image: see text] High refractive index (HRI) dielectric nanostructures offer a versatile platform to control the light–matter interaction at the nanoscale as they can easily support electric and magnetic modes with low losses. An additional property that makes them extraordinary is that they can su...

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Autores principales: González-Colsa, Javier, Olarte-Plata, Juan D., Bresme, Fernando, Albella, Pablo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9272441/
https://www.ncbi.nlm.nih.gov/pubmed/35770967
http://dx.doi.org/10.1021/acs.jpclett.2c00870
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author González-Colsa, Javier
Olarte-Plata, Juan D.
Bresme, Fernando
Albella, Pablo
author_facet González-Colsa, Javier
Olarte-Plata, Juan D.
Bresme, Fernando
Albella, Pablo
author_sort González-Colsa, Javier
collection PubMed
description [Image: see text] High refractive index (HRI) dielectric nanostructures offer a versatile platform to control the light–matter interaction at the nanoscale as they can easily support electric and magnetic modes with low losses. An additional property that makes them extraordinary is that they can support low radiative modes, so-called anapole modes. In this work, we propose a spectrally tunable anapole nanoheater based on the use of a dielectric anapole resonator. We show that a gold ring nanostructure, a priori nonresonant, can be turned into a resonant unit by just filling its hole with an HRI material supporting anapole modes, resulting in a more efficient nanoheater able to amplify the photothermal response of the bare nanoring. As proof of concept, we perform a detailed study of the thermoplasmonic response of a gold nanoring used as heating source and a silicon disk, designed to support anapole modes, located in its center acting as an anapolar resonator. Furthermore, we utilize the anapole excitation to easily shift the thermal response of these structures from the shortwave infrared range to the near-infrared range.
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spelling pubmed-92724412022-07-12 Enhanced Thermo-optical Response by Means of Anapole Excitation González-Colsa, Javier Olarte-Plata, Juan D. Bresme, Fernando Albella, Pablo J Phys Chem Lett [Image: see text] High refractive index (HRI) dielectric nanostructures offer a versatile platform to control the light–matter interaction at the nanoscale as they can easily support electric and magnetic modes with low losses. An additional property that makes them extraordinary is that they can support low radiative modes, so-called anapole modes. In this work, we propose a spectrally tunable anapole nanoheater based on the use of a dielectric anapole resonator. We show that a gold ring nanostructure, a priori nonresonant, can be turned into a resonant unit by just filling its hole with an HRI material supporting anapole modes, resulting in a more efficient nanoheater able to amplify the photothermal response of the bare nanoring. As proof of concept, we perform a detailed study of the thermoplasmonic response of a gold nanoring used as heating source and a silicon disk, designed to support anapole modes, located in its center acting as an anapolar resonator. Furthermore, we utilize the anapole excitation to easily shift the thermal response of these structures from the shortwave infrared range to the near-infrared range. American Chemical Society 2022-06-30 2022-07-07 /pmc/articles/PMC9272441/ /pubmed/35770967 http://dx.doi.org/10.1021/acs.jpclett.2c00870 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle González-Colsa, Javier
Olarte-Plata, Juan D.
Bresme, Fernando
Albella, Pablo
Enhanced Thermo-optical Response by Means of Anapole Excitation
title Enhanced Thermo-optical Response by Means of Anapole Excitation
title_full Enhanced Thermo-optical Response by Means of Anapole Excitation
title_fullStr Enhanced Thermo-optical Response by Means of Anapole Excitation
title_full_unstemmed Enhanced Thermo-optical Response by Means of Anapole Excitation
title_short Enhanced Thermo-optical Response by Means of Anapole Excitation
title_sort enhanced thermo-optical response by means of anapole excitation
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9272441/
https://www.ncbi.nlm.nih.gov/pubmed/35770967
http://dx.doi.org/10.1021/acs.jpclett.2c00870
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