Investigation of magneto-optical properties of dielectric gratings
based on the analysys of parity and dispersion of eigenmodes
D.A. Bykov, L.L. Doskolovich, V.A.Soifer
Image Processing Systems Institute of the RAS,
S. P. Korolyov Samara State Aerospace University
Full text of article: Russian language.
Abstract:
Magneto-optical (MO) properties of dielectric structure consisting of magnetized binary grating and magnetized homogeneous layer are investigated. The structure is magnetized in-plane perpendicularly to the grating slits. Rigorous modeling revealed a resonance MO effects determined by the relative change in the intensity of the transmitted or re?ected light when the sample is magnetized. The MO resonances exist both for TE- and for TM-polarization of incident wave. Structure dispersion curves are computed using the scattering matrix formalism. Magneto-optical effects are explained in terms of excitation of the structure eigenmodes, the positions of resonances are strictly described by structure dispersion curves. The variation of dispersion curves resulted from the structure magnetization is investigated. The eigenmode structures and the condition of the eigenmode excitation are examined. Classification of magneto-optical resonances based on excited mode configurations is proposed.
Key words: diffraction grating, magneto-optics, resonance, mode dispersion.
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