Dyakonov surface waves in dielectric crystals with negative anisotropy

TL;DR

This paper predicts a new type of Dyakonov surface waves in negatively anisotropic dielectrics, expanding the understanding of surface wave propagation and suggesting new materials for practical applications.

Contribution

It introduces the concept of Dyakonov surface waves in negative anisotropic dielectrics and analyzes their conditions using perturbation theory, opening new research avenues.

Findings

Surface waves exist in negatively anisotropic dielectrics.

Conditions for wave propagation are satisfied in specific boundary configurations.

Potential for new materials in surface wave applications.

Abstract

We report the prediction of a new type of Dyakonov surface waves that propagate along the flat strip of the interface between two dielectrics with negative anisotropy. It is shown that the surface waves condition is satisfied for negatively anisotropic dielectrics due to specific boundaries of the strip waveguide confined between two metallic plates. Such modes are studied by the perturbation theory in the approximation of weak anisotropy. The existence of Dyakonov surface waves in negative uniaxial crystals motivates us to reconsider the list of materials suitable for their practical implementation. We believe that this work opens a new unexplored research area in the field of surface waves.