二维超构表面:超透镜应用及研究进展

Two-Dimensional Metasurface:Application and Research Progress of Metalenses

超透镜是一种近年来新兴的基于超材料的先进平面光学装置,可以高自由度设计入射光的振幅、相位和偏振度以满足应用要求。超透镜可以通过不同的结构设计实现多种功能,例如达到衍射极限的聚焦、像差消除等。本文总结了超透镜的发展过程、基本原理和应用;基于激发原理将超透镜归纳为等离激元型和介质型,基于功能性将其归纳为变焦距型、像差消除型,以及宽带无色散型;分类综述了超透镜的最新进展和研究趋势;总结了相关研究的参数数据、优缺点、商业化进程并展望了未来。本文的主要目的是让读者全面了解超透镜,并为设计高性能的超透镜提供潜在的灵感。

Metalenses are new advanced planar optical devices based on the metamaterials.They can control the amplitude,phase,and polarization of incident lights with high free degrees to satisfy application requirements.Furthermore,they can perform various functions through different structural designs,such as diffraction-limited focusing and aberration correction.In this paper,we summarize the basic principles,applications,and progress of metalenses.Based on the excitation principle,we classify metalenses into plasmonic and dielectric metalenses.Based on the function,we classify them into tunable,aberration cancellation,and broadband achromatic metalenses.We also summarize the parameter data,advantages and disadvantages,and commercialization process of relevant research.Moreover,we discuss the problems and challenges faced by metalenses and recommend future research directions.The main purpose of this paper is to clarify metalenses and provide potential inspiration for designing high-performance metalenses.