Modeling of magneto-optical properties of periodic nanostructures

Optical and magneto-optical (MO) response from nanometer-size grating is calculated using improved Fourier modal method. The MO grating is modeled by an anisotropic MO layer of effective medium. The complex refractive indices and MO parameter of the effective layer are compared with simple effective medium approximation. Dependence of the optical and MO parameters on the filling factor of the grating is presented. MO grating with period in the sub-wavelength scale could be used as an effective medium with desired optical and MO properties.