Magneto-optical properties of diffraction grating on magnetized substrate

Magneto-optical properties of perforated heterostructure consisting of metallic grating on magnetic dielectric substrate are investigated. It is shown that considered structure demonstrates a magnetization-odd magneto optical effect determined by the relative change in intensity of the transmitted or reflected light when the sample is magnetized parallel to the grating slits. Magneto-optical effect is explained in terms of surface plasmon-polariton excited on grating - magnetic substrate interface.