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

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.

Three-periodic 1D photonic crystals for designing the photonic optical devices operating in the infrared regime

“…It is also shown that these structures can find their applications in the photonic devices controlled by the external fields [15], in designing the asymmetric and bidirectional nanophotonic devices which are used for the signal modulation/switching [16] and for the fabrication of highly efficient optical devices (optical switchers, filters, splitters, etc.) of the IR range [17].…”

Broad bandwidth waveguide polarizer via grating mediated mode conversion

“…In this paper, we propose a novel PBS based on grating mediated mode conversion. It is the grating, as a layer in a four-layer slab waveguide (FLSW) [17,18], that induces the mode conversion via the mechanism of grating diffraction to reflect back the TM-or TE-polarized light. Numerical simulation shows this compact PBS facilitates broadband, high polarization extinction ratio (PER) and large fabrication tolerance.…”