Tunable Perfect Anomalous Reflection in Metasurfaces with Capacitive Lumped Elements

TL;DR

This paper presents a metasurface design with tunable perfect anomalous reflection achieved through capacitive lumped elements, enabling dynamic control over wavefront direction for different polarizations and diffraction orders.

Contribution

It introduces a novel metasurface with tunable lumped elements for continuous control of anomalous reflection, advancing reconfigurable wavefront manipulation.

Findings

Effective control of evanescent field distribution.

Tunable reflection for TE and TM polarizations.

Successful reflection steering to multiple diffraction orders.

Abstract

We demonstrate tunable perfect anomalous reflection with metasurfaces incorporating lumped elements. The tunable capacitance of each element provides continuous control over the local surface reactance, allowing for controlling the evanescent field distribution and efficiently tilting the reflected wavefront away from the specular direction. The performance of the metasurface is evaluated for both TE and TM polarization and for reflection to the first and second diffraction order.