Magnetic control of waveguide modes of Bragg structures

J. Phys. D: Appl. Phys.

Rozhleys

et al. 2016

We present a theoretical study of the dispersion and energy properties of the eigenwaves (TEand TM-modes) in a four-layer structure composed of a magneto-optical yttrium iron garnet guiding layer on a dielectric substrate covered by a planar nanocomposite guiding multilayer. The bigyrotropic properties of yttrium-iron garnet are taken into account for obtaining the dispersion equation and an original algorithm for the guided modes identification is proposed. We demonstrated the polarization switching of TE-and TM-modes dependent on the geometrical parameters of the guiding layers. The dispersion diagrams and field profiles are used to illustrate the change of propagation properties with variation of the multilayer thickness ratio of the nanocomposite's layers. The energy flux distributions across the structure are calculated and the conditions of the optimal guiding regime are obtained. The power switching ratio in the waveguide layers of about 6 dB for the wavelength range of 100 nm is shown to be achieved.

Section: Introductionmentioning

confidence: 99%

Four-layer nanocomposite structure as an effective optical waveguide switcher for near-IR regime

Panyaev

J. Phys. D: Appl. Phys.

Rozhleys

et al. 2016

“…In Ref. [20] the studies of the waveguide modes of one-dimensional magnetic PC with in-plane magnetized layers and nonmagnetic PC with a cladding magnetic layer on the top of the structure were reported.…”

Section: Introductionmentioning

confidence: 99%

Complex waveguide based on a magneto-optic layer and a dielectric photonic crystal

Panyaev

Superlattices and Microstructures

Rozhleys

et al. 2016

A B S T R A C TWe theoretically investigate the dispersion and polarization properties of the electromagnetic waves in a multi-layered structure composed of a magnetooptical waveguide on dielectric substrate covered by one-dimensional dielectric photonic crystal. The numerical analysis of such a complex structure shows interesting properties in propagation of electromagnetic waves, particularly, polarization filtration of TE-and TM-modes depending on geometrical parameters of the waveguide and photonic crystal. We consider different regimes of the modes propagation inside such a structure: when guiding modes propagate inside the magnetic film and decay in the photonic crystal and vice versa; when they propagate in both magnetic film and photonic crystal.

Confined states in photonic-magnonic crystals with complex unit cell

Journal of Applied Physics

Lyubchanskii

Kłos

et al. 2016

We have investigated multifunctional periodic structures in which electromagnetic waves and spin waves can be confined in the same areas. Such simultaneous localization of both sorts of excitations can potentially enhance the interaction between electromagnetic waves and spin waves. The system we considered has a form of one dimensional photonic-magnonic crystal with two types of magnetic layers (thicker and thinner ones) separated by sections of the dielectric photonic crystals. We focused on the electromagnetic defect modes localized in the magnetic layers (areas where spin waves can be exited) and decaying in the sections of conventional (nonmagnetic) photonic crystals. We showed how the change of relative thickness of two types of the magnetic layers can influence on the spectrum of spin waves and electromagnetic defect modes, both localized in magnetic parts of the system.