Effective chiral response of anisotropic multilayered metamaterials

TL;DR

This paper investigates how multilayered anisotropic metamaterials can develop effective chirality due to broken inversion symmetry, deriving the chirality tensor and identifying optimal layer arrangements for maximum chiral response.

Contribution

It introduces a method to derive the effective chirality tensor of anisotropic multilayered metamaterials with rotated layers, highlighting configurations that maximize chiral effects.

Findings

Derived the effective chirality tensor for multilayered anisotropic structures.

Identified layer arrangements that maximize chiral response.

Analyzed both normal and oblique incidence scenarios.

Abstract

We consider a multilayered metamaterial composed of anisotropic layers with in-plane anisotropy axes periodically rotated with respect to each other. Due to the breaking of inversion symmetry, the structure develops an effective chirality. We derive the effective chirality tensor of the metamaterial describing both normal and oblique incidence scenarios. We also identify the arrangement of the layers maximizing chiral response for the fixed lattice period, wavelength and anisotropy of the layers.