Infra-red spiral nano-antennas

In this paper, a study is conducted into spiral nanoantennas for solar energy collection, with the aim of increasing the captured electric field utilizing Finite Element Method (FEM) based simulations. The obtained results demonstrate that the electric field in the gap can be increased by coupling more elements using feeding lines. Two types of spiral nano-antennas have been used for this purpose, i.e. square and logarithmic spiral nano-antennas, which resonate near the wavelength of 13 μm, where the main of energy is expected to be located. Furthermore, the polarization responses of the designed nanoantennas to 2 orthogonal polarized waves have been obtained and presented.