Open AccessWide-angle Reconfigurable Refraction by Silicon Fourier Metasurfaces
Author(s) -
A. A. Antonov,
M. V. Gorkunov
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2015/1/012005
Subject(s) - reconfigurability , optics , silicon , substrate (aquarium) , fourier transform , harmonics , angle of incidence (optics) , permittivity , materials science , rayleigh scattering , refraction , range (aeronautics) , physics , optoelectronics , computer science , telecommunications , dielectric , geology , oceanography , quantum mechanics , voltage , composite material
We design metasurfaces based on silicon films with smooth relief described by several Fourier harmonics and study their ability to redirect the refracted light over a wide angular range controlled by subtle variations of the optical setup. We use semi-analytical approach based on the Rayleigh hypothesis as well as full-scale numerical solutions to optimize the relief shape. To illustrate the reconfigurability potential, we design metasurfaces efficiently redirecting the refracted light from 83° to −73° with respect to the normal, when the angle of incidence is varied from 0° to 2°, and from 80° to −74°, when the substrate permittivity is altered from 2.3 to 2.2.