LOW-FREQUENCY SURFACE-WAVES IN THIN-FILMS OF PLASMA-LIKE MEDIA

The results of theoretical analysis of low-frequency surface waves in thin films of plasma-like media (gaseous plasmas, electron-hole semi-c onductor plasma, electron metals plasma) are presented. The wavelength s along the surface are assumed to be much larger than the thickness a of films with sharp boundaries. The mirror reflections of carriers fr om film surfaces are assumed. The general dispersion relation for surf ace waves is obtained and investigated in the low-frequency range, whe re the waves become potential (longitudinal) and the spatial dispersio n of dielectric permittivity is essential.