Dyakonov-Tamm wave at the planar interface of a chiral sculptured thin film and an isotropic dielectric material

摘要

Surface waves, named here as Dyakonov-Tamm waves, can exist at the planarinterface of an isotropic dielectric material and a chiral sculptured thin film(STF). Due to the periodic nonhomogeneity of a chiral STF, the range of therefractive index of the isotropic material is smaller but the range of thepropagation direction in the interface plane is much larger, in comparison tothose for the existence of Dyakonov waves at the planar interface of anisotropic dielectric material and a columnar thin film.