Optical properties of a four-layer waveguiding nanocomposite structure in near-IR regime

TL;DR

This paper theoretically investigates the optical properties of a four-layer nanocomposite waveguide structure in the near-IR regime, focusing on TE and TM modes, dispersion relations, and energy flux distributions.

Contribution

It introduces a new theoretical model and an original algorithm for analyzing guided modes in a complex four-layer magneto-optical nanocomposite structure.

Findings

Significant difference in partial power fluxes within waveguide layers at 200 nm wavelength.

Dispersion spectra analyzed considering bigyrotropic properties of yttrium iron garnet.

Energy flux distributions across the structure are calculated and characterized.

Abstract

The theoretical study of the optical properties of TE- and TM- modes in a four-layer structure composed of the magneto-optical yttrium iron garnet guiding layer on a dielectric substrate covered by planar nanocomposite guiding multilayer is presented. The dispersion equation is obtained taking into account the bigyrotropic properties of yttrium-iron garnet, and an original algorithm for the guided modes identification is proposed. The dispersion spectra are analyzed and the energy flux distributions across the structure are calculated. The fourfold difference between the partial power fluxes within the waveguide layers is achieved in the wavelength range of 200 nm.