Anisotropy in double negative permittivity and permeability materials or left-handed materials : the effect on guided wave propagating electromagnetic fields

TL;DR

This paper investigates how anisotropy in negative index materials affects electromagnetic field distributions in guided wave structures, revealing control mechanisms for wave behavior through tensor modifications.

Contribution

It introduces a Green's function-based analysis of anisotropic left-handed materials, showing how tensor modifications influence wave distribution and switching between volumetric and surface modes.

Findings

Anisotropy allows control over wave distribution in LHM substrates.

Tensor modifications can switch wave modes from volumetric to surface.

Comparison shows distinct field behaviors between LHM and RHM substrates.

Abstract

Effect of anisotropy in the physical tensor description of the negative index of refraction material (left-handed material, LHM) acting as a substrate is found on the electromagnetic field distributions. Field distributions are provided in the GHz region in the cross-section of the uniform microstrip guided wave structure. It is found from ab initio Green's function calculations that modifying the tensor can allow control because the wave changes volumetrically, or switches from volumetric to surface, in its distribution of fields. Comparison is made of the LHM results to ordinary right-handed material (RHM) acting as a substrate.