Faraday Effect in Bi-Periodic Photonic-Magnonic Crystals

Abstract

We present a theoretical investigation of the polarization plane rotation at light transmission -Faraday effect, through onedimensional multilayered magneto-photonic systems consisting of periodically distributed magnetic and dielectric layers. We calculate Faraday rotation spectra of photonic-magnonic crystals, where cell (or supercell) is composed of magnetic layer and dielectric layer (or section of dielectric photonic crystal). We found that the Faraday rotation of p-polarized incident light is increasing in the transmission band with the number of magnetic supercells. The increase of Faraday rotation is observed also in vicinity of the band-gap modes localized in magnetic layers but the maximal polarization plane rotation angles are reached at minimal transmittivity. We show that presence of linear magneto-electric interaction in the magnetic layers leads to significant increase of the Faraday rotation angles of spolarized incident light in the vicinity of the fine-structured modes inside the photonic-band-gap.Index Terms-Faraday effect, magnetic photonic crystal, photonic-magnonic crystal, polarization plane rotation.

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