Polarization transformations by a magneto-photonic layered structure in vicinity of ferromagnetic resonance

TL;DR

This paper investigates how a magnetophotonic layered structure affects polarization near ferromagnetic resonance, considering material losses, and analyzes its electromagnetic properties through differential equations and transfer matrix eigenvalues.

Contribution

It introduces a method to analyze polarization transformations in magnetophotonic structures near ferromagnetic resonance, accounting for significant material losses.

Findings

Identified stopbands and passbands of eigenwaves.

Determined frequency and angular dependence of reflection and transmission.

Calculated polarization rotation and ellipticity of reflected and transmitted fields.

Abstract

The polarization properties of a magnetophotonic crystal at the frequencies located in the vicinity of ferromagnetic resonance are studied. The investigations are curried out taking into consideration the fact that the magnitude of material losses in ferrite layers at this frequency band is significant. The method is based on obtaining a system of ordinary differential equations and further analyzing the stability of solutions of this system. The electromagnetic properties of the structure under study are found out via the analysis of the eigenvalues of the transfer matrix of the structure period. On this basis the boundaries of the stopbands and passbands of the eigenwaves are determined. The frequency and angular dependences of the reflection and transmission coefficients are given. The angle of the rotation of the polarization plane and the ellipticity of the reflected and transmitted fields are obtained.