Designing thermoplasmonic properties of metallic metasurfaces

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.