Coexistence of bulk and surface polaritons in a~magnetic-semiconductor superlattice influenced by a transverse magnetic field

TL;DR

This paper demonstrates how a magnetic-semiconductor superlattice can support coexisting bulk and surface polaritons within the same frequency and wavevector range by tuning material properties and magnetic field orientation.

Contribution

It introduces a method to achieve coexistence of bulk and surface polaritons in a superlattice using effective medium theory and specific material and geometric configurations.

Findings

Coexistence of bulk and surface polaritons achieved in superlattices.

Dispersion characteristics of polaritons calculated using effective medium theory.

Identification of conditions for hybrid EH and HE surface polaritons.

Abstract

It is demonstrated that the effect of coexistence of bulk and surface polaritons within the same frequency band and wavevector space can be achieved in a magnetic-semiconductor superlattice providing a conscious choice of characteristic resonant frequencies and material fractions of the structure's underlying components as well as geometry of the external static magnetic field. The study is based on the effective medium theory which is involved to calculate dispersion characteristics of the long-wavelength electromagnetic modes of ordinary and extraordinary bulk polaritons and hybrid EH and HE surface polaritons derived via averaged expressions with respect to the effective constitutive parameters of the superlattice.