TM and TE surface electromagnetic waves in the dielectric – inhomogeneous dielectric structure

Dependence of dielectric permeability on coordinates defines existence domain of nonlocal dispersion. At certain values of characteristic scales of spatial inhomogeneity, this domain can be formed in a range of frequencies... [ view full abstract ]

Dependence of dielectric permeability on coordinates defines existence domain of nonlocal dispersion. At certain values of characteristic scales of spatial inhomogeneity, this domain can be formed in a range of frequencies that are far from natural resonances and absorption bands of material. The use of materials with strong artificial dispersion opens new opportunities for synthesis of optoelectronic and radio systems, development of optimal communication modes and energy transfer through layered medium.
In the present work, we study surface polaritons in structure of the dielectric – inhomogeneous dielectric with dielectric permeability depending on z-coordinate. Inhomogeneity can be created by acoustic wave’s propagation in the medium, which results in compression and extension. Frequency of surface polaritons has been considered in infrared and visible spectral regions.
TE- and TM-waves were studied. For TE-wave, which cannot exist in structure of two homogeneous dielectrics, existence condition in inhomogeneous medium was derived. Also, we obtain dispersion equations, distribution of induced magnetic moment (the inverse Faraday effect), energy flux density vector (Poynting vector) and field components of each wave. All calculations were performed analytically and numerically using the methods of classical electrodynamic.
This work was supported in part by RFBR (grants ## 16-37-00023, 16-07-00751, 16-29-14045) and RScF (grant # 14-22-00279).