Terahertz metamaterials for linear polarization conversion and anomalous refraction

TL;DR

This paper presents ultrathin, broadband terahertz metamaterials that efficiently convert linear polarization and enable near-perfect anomalous refraction, advancing high-performance photonic device capabilities in the terahertz range.

Contribution

It introduces novel ultrathin, broadband metamaterials for terahertz polarization conversion and anomalous refraction, surpassing limitations of conventional methods.

Findings

High-efficiency polarization conversion in terahertz range

Near-perfect anomalous refraction achieved

Broadband operation demonstrated

Abstract

Polarization is one of the basic properties of electromagnetic waves conveying valuable information in signal transmission and sensitive measurements. Conventional methods for advanced polarization control impose demanding requirements on material properties and attain only limited performance. Here, we demonstrate ultrathin, broadband, and highly efficient metamaterial-based terahertz polarization converters that are capable of rotating a linear polarization state into its orthogonal one. Based on these results we create metamaterial structures capable of realizing near-perfect anomalous refraction. Our work opens new opportunities for creating high performance photonic devices and enables emergent metamaterial functionalities for applications in the technologically difficult terahertz frequency regime.