Metasurfaces for perfect and full control of refraction and reflection

TL;DR

This paper introduces a new method for designing metasurfaces capable of precisely controlling transmitted and reflected electromagnetic fields using an impedance matrix approach, enabling perfect refraction and reflection.

Contribution

The paper presents a general synthesis approach for metasurfaces using impedance matrices, highlighting the importance of bianisotropic coupling for full control of wave transmission.

Findings

Metasurfaces can be designed for perfect refraction in arbitrary directions.

Impedance matrix synthesis enables precise control of transmitted and reflected fields.

Bianisotropic coupling is crucial for achieving full control of transmission.

Abstract

In this talk we present and discuss a new general approach to the synthesis of metasurfaces for full control of transmitted and reflected fields. The method is based on the use of an equivalent impedance matrix which connects the tangential field components at the two sides on the metasurface. Finding the impedance matrix components, we are able to synthesize metasurfaces which perfectly realize the desired response. We will explain possible alternative physical realizations and reveal the crucial role of bianisotropic coupling to achieve full control of transmission through perfectly matched metasurfaces. This abstract summarizes our results on metasurfaces for perfect refraction into an arbitrary direction.