Abstract
The study of guided modes in planar systems allows a precise characterization of refractive index, thickness and optical anisotropy. On the basis of the matrix elements, the conditions for waveguiding in magneto-optical simple layers, double layers and in sandwiches at transversal geometry have been specified. In this case there are two independent dispersion relations for TE and TM modes for discussed thin film configurations. Usually we assume that the relative permeability is equal to 1 in the frame of optical frequencies. This approximation is problematic in far infrared region or for ultrathin films in the optical one. Through the extension of the Yeh's formalism to magneto optical media the formulae of dispersion relations for guided modes in planar structures with both permittivity and permeability tensors have been derived. The permeability tensor effect at transversal magnetization on waveguiding in mono- and double layer systems and in sandwiches is analyzed in detail. The experimental possibilities of dark mode spectroscopy in the analysis of the planar magneto-optical systems inclusive of permeability tensor element specification are studied.
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