Electromagnetic Heat-induced in Meso-structures: Computation of Temperature in Metallic Dimers

Abstract — The illumination of a dimer metallic nanostructure is known to produce an in-tense source of light, with nanometric size. This confinement of light in the gap between the two material structures can induce an increase of the absorption of the electromagnetic energy in the nanaoantenna itself, and therefore its warm-up. The multiphysics problem associated to this photo-thermal effect is modeled through a Finite Element Method (FEM). This contribu-tion consists in computing both the electromagnetic field and the temperature, and discussing the influence of the gap, in the case of a bow-tie nanoantenna. The applications could be the development of nanodevices with thermal properties. 1