Enhanced thermo-optical response by means of anapole excitation.
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Published version
Supporting information
Author(s)
González-Colsa, Javier
Olarte-Plata, Juan D
Bresme, Fernando
Albella, Pablo
Type
Journal Article
Abstract
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.
Date Issued
2022-06-30
Date Acceptance
2022-06-23
Citation
Journal of Physical Chemistry Letters, 2022, 13, pp.6230-6235
ISSN
1948-7185
Publisher
American Chemical Society
Start Page
6230
End Page
6235
Journal / Book Title
Journal of Physical Chemistry Letters
Volume
13
Copyright Statement
© 2022 The Authors. Published by American Chemical Society. This work is published under CC BY 4.0 International licence.
License URL
Sponsor
The Leverhulme Trust
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/35770967
Grant Number
RPG-2018-384
Subjects
physics.optics
physics.optics
physics.app-ph
02 Physical Sciences
03 Chemical Sciences
Publication Status
Published online
Coverage Spatial
United States
Date Publish Online
2022-06-30