Review:Chromatic Dispersion Manipulation Based on Optical Metasurfaces

Metasurfaces are densely arrayed two-dimensional (2D) artificial planar metamaterials, which can manipulate the polarization, distribution, and amplitude of light by accurately controlling the phase of the scattering light. The flat metasurface has the potential to substantially reduce the thickness and complexity of the structures and allows ease of fabrication and integration into devices. However, the inherent chromatic aberration of the metasurface originating from the resonant dispersion of the antennas and the intrinsic chromatic dispersion limit their quality. How to effectively suppress or manipulate the chromatic aberration of metalenses has attracted worldwide attention in the last few years, leading to a variety of excellent achievements. Furthermore, utilizing the chromatic dispersion of metasurface to realize special functionalities is also of significant importance. In this review, the most promising recent examples of chromatic dispersion manipulation based on optical metasurface materials are highlighted and put into perspective.