Polarimetric Control of Reflective Metasurfaces

TL;DR

This paper presents a method for synthesizing reflective metasurface cells that precisely control all scattering parameters, including cross-coupling, enabling enhanced design capabilities for advanced electromagnetic applications.

Contribution

It introduces a novel synthesis approach for controlling all four scattering parameters of reflective cells using geometric transformations on patches.

Findings

Controlled all four scattering parameters in reflective metasurfaces.

Achieved phase and magnitude control for improved performance.

Validated approach for normal and oblique incidence.

Abstract

This letter addresses the synthesis of reflective cells approaching a given desired Floquet's scattering matrix. This work is motivated by the need to obtain much finer control of reflective metasurfaces by controlling not only their co-polarized reflection but also their cross-coupling behavior. The demonstrated capability will enable more powerful design approaches -involving all field components in phase and magnitude- and consequently better performance in applications involving reflective metasurfaces. We first expose some fundamental theoretical constraints on the cell scattering parameters. Then, a successful procedure for controlling all four scattering parameters by applying parallelogram and trapezoid transformations to square patches is presented, considering both normal and oblique incidence.