Loss enhanced transmission and collimation in anisotropic epsilon-near-zero metamaterials

TL;DR

This paper demonstrates how material loss in anisotropic epsilon-near-zero metamaterials can enhance electromagnetic transmission and collimation, supported by theoretical analysis and numerical simulations.

Contribution

It reveals the physical mechanism behind loss-enhanced transmission in ENZ metamaterials and demonstrates its realization in multilayered structures.

Findings

Loss enhances transmission and collimation in ENZ metamaterials.

Iso-frequency contour analysis explains the physical mechanism.

Numerical simulations confirm feasibility in multilayered structures.

Abstract

We verify the extraordinary transmission enhancement and collimation induced by the material loss in anisotropic near-zero permittivity (ENZ) metamaterials, and reveal the physical mechanism of this exotic electromagnetic phenomenon via the iso-frequency contour (IFC) analysis. In addition, we demonstrate the possibility in realization of such loss enhanced transmission of Gaussian beam in realistic silver-germanium multilayered structures by applying full-wave numerical simulations.