Design and optimization of high-efficiency meta-devices based on the equivalent circuit model and theory of electromagnetic power energy storage

Abstract

Abstract Meta-devices with high operation efficiency to control electromagnetic waves are of great interest in a variety of applications. In this paper, we propose a general design method to achieve maximum operating efficiency for different-function meta-devices. The method is based on the equivalent circuit model and the theory of electromagnetic energy storage. To demonstrate its validity, three different kinds of functional meta-devices, including a beam deflection meta-array, circular polarization microwave absorber and linear-to-circular polarization converter, are presented using the proposed method. The method can be used for arbitrarily-structured meta-devices, three-dimensional (3D) all-metal structures or planar dielectric-metal-mixed structures. Additionally, such a method may be applied to design meta-devices for any polarized waves and can be expanded to other operating frequency bands.