Coexistence of bulk and surface polaritons in a~magnetic-semiconductor   superlattice influenced by a transverse magnetic field
  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. 
Vladimir R. Tuz, Volodymyr I. Fesenko, Illia V. Fedorin, Hong-Bo Sun,   Wei Han
cond-mat.mtrl-sci