Dyakonov-Tamm waves guided jointly by an ordinary, isotropic,   homogeneous, dielectric material and a hyperbolic, dielectric, structurally   chiral material
  The planar interface of an ordinary, isotropic, homogeneous, dielectric material and a hyperbolic, dielectric, structurally chiral material can support the propagation of one or multiple Dyakonov-Tamm waves, at a specified frequency and along a specified direction in the interface plane. When multiple Dyakonov-Tamm waves can exist, they differ in phase speed, propagation length, degree of localization to the interface, and spatial profiles of the associated electromagnetic fields. Dependence on the relative permittivity scalar of the isotropic partnering material suggests exploitation for optical sensing of analytes. 
Akhlesh Lakhtakia and Muhammad Faryad
physics.optics