Enhanced Thermo-optical Response by Means of Anapole Excitation.

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 res

SUBMITTER: Gonzalez-Colsa J 

PROVIDER: S-EPMC9272441 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature