Towards Efficient EM Wave Manipulation Using a Discrete Dielectric Huygens’ Metasurface

This paper presents a spatially varying discrete dielectric Huygens’ metasurface (DD-HMS) that achieves beam splitting. The proposed structure consists of two elements per grating period and the phase difference between neighbouring elements is 180°. The resultant bipartite Huygens’ metasurface leads to a simplified, robust and cost-effective design as compared to finely discretized metasurfaces. A 2D full-wave Floquet simulation demonstrates that the proposed metasurface splits the normal incident plane wave into different directions according to the generalized Snell‘s law, and contains over 80% of the transmitted power.