Realizing bending waveguides with anisotropic epsilon-near-zero metamaterials

TL;DR

This paper demonstrates that anisotropic epsilon-near-zero metamaterials can be used to create highly efficient bending waveguides with over 95% transmission, enabling advanced control of wave propagation.

Contribution

The study introduces a novel application of anisotropic epsilon-near-zero metamaterials for constructing nearly perfect bending waveguides with high transmission efficiency.

Findings

High transmission (>95%) in bending waveguides using anisotropic ENZ metamaterials

Wave control achieved through power flow redistribution via surface waves

Waves can be reflected by small perfect magnetic conductor defects

Abstract

We study metamaterials with an anisotropic effective permittivity tensor in which one component is near zero. We find that such an anisotropic metamaterial can be used to control wave propagation and construct almost perfect bending waveguides with a high transmission rate (>95%). This interesting effect originates in the power flow redistribution by the surface waves on the input and output interfaces, which smoothly matches with the propagating modes inside the metamaterial waveguide. We also find that waves in such anisotropic epsilon-near-zero materials can be reflected by small-sized perfect magnetic conductor defects. Numerical calculations have been performed to confirm the above effects.