Dyakonov-like waveguide modes in an interfacial strip waveguide

TL;DR

This paper investigates Dyakonov-like waveguide modes at the interface of two anisotropic media, revealing unique field distributions and confirming findings with simulations, potentially advancing surface wave research.

Contribution

It introduces the concept of Dyakonov waveguide modes with non-monotonic decay and validates analytical predictions through electromagnetic simulations.

Findings

Dyakonov waveguide modes can have local maxima away from the interface.

Analytical results agree with full-wave electromagnetic simulations.

The work offers new insights into Dyakonov surface wave phenomena.

Abstract

We study Dyakonov surface waveguide modes in a waveguide represented by an interface of two anisotropic media confined between two air half-spaces. We analyze such modes in terms of perturbation theory in the approximation of weak anisotropy. We show that in contrast to conventional Dyakonov surface waves that decay monotonically with distance from the interface, Dyakonov waveguide modes can have local maxima of the field intensity away from the interface. We confirm our analytical results by comparing them with full-wave electromagnetic simulations. We believe that this work can bring new ideas in the research of Dyakonov surface waves.