Far-field scattering control of wave based on all-dielectric blazed encoding metagrating

Coding metagrating metasurfaces can realize flexible and effective control of polarization, amplitude, and phase of electromagnetic waves. The coded metagrating builds a bridge between the physical unit structure and the digital coding, and can realize the digital coding calculation processing of the physical device. We propose several all dielectric encoded metagrating sequences, and the detailed analysis of their far-field scattering properties is given. Based on the principle of digital coding addition, we add two coding metagrating sequences to obtain a new coding sequence. This new coding sequence results in an additive integration of the functions of the original two coding sequences. This method provides an idea for the realization of multifunctional devices.