Modal phenomena of surface and bulk polaritons in magnetic-semiconductor superlattices
arXiv:1705.08597 · doi:10.5772/intechopen.71837
Abstract
We discuss peculiarities of bulk and surface polaritons propagating in a composite magnetic-semiconductor superlattice influenced by an external static magnetic field. Three particular configurations of magnetization, namely the Voigt, polar and Faraday geometries are considered. In the long-wavelength limit, involving the effective medium theory, the proposed superlattice is described as an anisotropic uniform medium defined by the tensors of effective permittivity and effective permeability. The study is carried out in the frequency band where the characteristic resonant frequencies of the underlying constitutive magnetic and semiconductor materials of the superlattice are different but closely spaced. The effects of mode crossing and anti-crossing in dispersion characteristics of both bulk and surface polaritons are revealed and explained with an assistance of the concept of Morse critical points from the catastrophe theory.
arXiv comment13 pages, 7 figures
References in corpus (7)
- Theory of ferromagnetic (III,Mn)V semiconductors
- Gyrotropic-nihility state in a composite ferrite-semiconductor structure
- Polaritons dispersion in a composite ferrite-semiconductor structure near gyrotropic-nihility state
- Dispersion regions overlapping for bulk and surface polaritons in a magnetic-semiconductor superlattice
- Crossing and anti-crossing effects of polaritons in a magnetic-semiconductor superlattice influenced by an external magnetic field
- Coexistence of bulk and surface polaritons in a~magnetic-semiconductor superlattice influenced by a transverse magnetic field
- Gaussian Beam Transmission through a Gyrotropic-Nihility Finely-Stratified Structure