Hybrid waves localized at hyperbolic metasurfaces

TL;DR

This paper uncovers a new class of surface electromagnetic waves on hyperbolic metasurfaces, characterized by hybrid polarization states and influenced by material losses, expanding understanding of wave behavior on engineered surfaces.

Contribution

It introduces the concept of hyperbolic metasurface-supported waves with hybrid TE-TM polarization and provides analytical descriptions including loss effects.

Findings

Existence of two wave branches with hybrid polarization

Wave polarization varies with frequency and direction

Analytical expressions for wave behavior including losses

Abstract

We reveal the existence of a new type of surface electromagnetic waves supported by hyperbolic metasurfaces, described by a conductivity tensor with an indefinite signature. We demonstrate that the spectrum of the hyperbolic metasurface waves consists of two branches corresponding to hybrid TE-TM waves with the polarization that varies from linear to elliptic or circular depending on the wave frequency and propagation direction. We analyze the effect of losses of the surface waves and derive the corresponding analytical asymptotic expressions.