Optimization of gyrotropic double-periodic perforated layer for Brewster´s angle polarizer design

We develop the analytical solution to the problem concerning the plane wave scattering from a double-periodic gyrotropic layer in quasi-static case, i.e. if the structure periods are much smaller than the wavelength and the field remains approximately constant over the period. Using the solution [1], obtained by the Method of Integral Functionals based on the rigorous integral-differential equations [2] we drived the analytical expressions for the scattered fields in the single-mode approximation, i.e. by retaining only the zero diffraction orders in the full-wave Floquet expansions.