Numerical Demonstrations of Beam Reconfigurable Reflective-type Opto-mechanical Metasurface

In this article, we prove a new type of opto-mechanical microwave metasurface with reflected and controllable beam through theory and simulation. The unit structure of the metasurface prepares an ELC metal resonance ring on a flexible medium FPC, and air is filled between the flexible medium FPC and the metal back plate at the bottom. Through the independent design of the cantilever arm and the air gap of each unit, the non-linear response characteristics of each unit in the metasurface are different under the excitation of electromagnetic waves of different intensities. It is based on the generalized Snell’s law to realize the abnormal deflection of the reflected beam.This research paper briefly analyzes the geometry and working mechanism of opto-mechanical metamaterials. Furthermore, the size of the cantilever arm corresponding to each unit structure is designed. Compared with the traditional nonlinear metasurface and its reconfigurable metasurface, the goal of this design is to achieve more flexible and reconfigurable functions. In addition, the electromagnetic response characteristics of each unit in the metasurface are independently controlled. Our findings will enrich the research field of nonlinear controllable metasurface technology on the coupling mechanism of electromagnetic energy and structural potential energy, which may lead to many interesting applications, such as beam scanning reflector antennas, planar devices with adjustable focal length and so on.