Multiple non-diffracting beams by reflective surface based on admittance superposition

摘要

A method to produce multiple nondiffracting beams by a reflective metasurface is introduced. The reflective metasurface is realized by admittance superposition modulation. Only one artificial admittance surface can generate a single nondiffracting beam. The admittance superposition of multiple surfaces will produce multiple beams, which can propagate in different directions with good nondiffracting properties. Finally, the metasurface is fabricated and experimentally tested, and the results demonstrate that the design is logical. The multiple nondiffracting beams may have potential applications in imaging, multipoint communications, and object detection and identification. Published under license by AIP Publishing.