Designing Thermoplasmonic Properties of Metallic Metasurfaces

TL;DR

This paper introduces analytical and numerical methods to design metallic metasurfaces with tunable thermoplasmonic properties, enabling precise control of nanoscale heat flux and temperature gradients through polarization manipulation.

Contribution

It presents a new formalism for three-dimensional temperature computation in metallic particle arrays, facilitating the design of thermoplasmonic metasurfaces with controllable heat generation.

Findings

Temperature rise can be controlled by incident polarization.

Design of metasurfaces enables remote heat flux manipulation.

Analytical and numerical methods provide accurate temperature predictions.

Abstract

Surface plasmons have been used recently to generate heat nanosources, the intensity of which can be tuned, for example, with the wavelength of the excitation radiation. In this paper, we present versatile analytical and numerical investigations for the three-dimensional computation of the temperature rise in complex planar arrays of metallic particles. In the particular case of elongated particles sustaining transverse and longitudinal plasmon modes, we show a simple temperature rise control of the surrounding medium when turning the incident polarization. This formalism is then used for designing novel thermoplasmonic metasurfaces for the nanoscale remote control of heat flux and temperature gradients.