Two-Dimensional Non-periodic Metasurface for Dual Polarization Retroreflection

摘要

Traditionally., retroreflection (or blazing) of an obliquely incident wave can be realized by periodic blazed gratings. In this work, the non-periodic design method is used to achieve retroreflection for both TE and TM plane wave. We discretize the finite surface into subwavelength elements and characterize the element with its phase response. The scattering response of the entire surface (demonstrated by retroreflection case in this paper) can then be determined by optimizing the local phase response for both polarizations. The computation cost is low, and the algorithm can be easily adjusted to reach more flexible objectives. This theoretical method has been verified by both full-wave simulation and measurement at 10 GHz.