Sparsely Discretized Refracting Dielectric Huygens’ Metasurface at 28 GHz

We report a sparsely discretized refracting dielectric Huygens' metasurface comprising only two meta-atoms per period. The proposed metasurface is termed as bipartite dielectric Huygens' metasurface (Bi-DHMS), which dramatically simplifies the design and pave the way towards efficient electromagnetic (EM) wave manipulation. Such sparse discretization reduces inter-element mutual coupling, leading to efficient, cost-effective, and robust metasurface design. Through full-wave Floquet simulations at 28 GHz, we have demonstrated that a judiciously designed Bi-DHMS can refract an incoming electromagnetic wave from 15 deg to -45 deg, where more than 80% of the total transmitted power is coupled to the desired Floquet space harmonic.