Nonplanar Chiral Metamaterials with Negative Index

TL;DR

This paper reports the experimental and numerical demonstration of nonplanar chiral metamaterials exhibiting giant optical activity, circular dichroism, and negative refractive index, advancing the development of 3D isotropic chiral metamaterials.

Contribution

It introduces a novel design of nonplanar chiral metamaterials with significant optical properties, validated through experiments and simulations.

Findings

Giant optical activity observed

Negative refractive index achieved

Good agreement between experiments and simulations

Abstract

We demonstrate experimentally and numerically that nonplanar chiral metamaterials give giant optical activity, circular dichroism, and negative refractive index. The transmission, reflection, and the retrieval results of the experiments agree pretty well with the simulations. This is an important step toward the design and fabrication of three-dimensional isotropic chiral metamaterials.