液晶超表面动态调制器件综述(特邀)

Review on Dynamic Modulator via Liquid Crystal Metasurface(Invited)

液晶超表面(LCM)因其能灵活动态地控制电磁波的振幅、相位、偏振和波前特性,成为光学器件研究中的一种前沿技术。文章综述LCM设计与应用的最新进展,强调其在光学检测、成像和计算等领域的巨大潜力,LCM利用亚波长结构设计的高自由度,通过外加电场实现对光学特性的动态调控。并探讨LCM的基本原理,包括液晶材料与超表面的结合,实现实时调整光学特性,并分析其各种应用,如可调谐滤波器、光束转向和动态全息图等。此外,还介绍接触式和非接触式LCM,以及相位调制和信息通道切换机制,讨论LCM在增强光通信、传感和显示技术中的挑战和未来前景,全面概述这一前沿领域的发展。

Liquid crystal metasurfaces(LCMs)have emerged as a promising technique in optical device research due to their ability of flexibly and dynamically control electromagnetic wave properties such as amplitude,phase,polarization,and wavefront.This review discusses the progress in the design and application of LCMs,highlighting their significant potential in various fields like optical detection,imaging,and computation.LCM leverage the high degree of freedom in sub-wavelength structural design,enabling dynamic modulation of optical characteristics through external electric fields.The paper explores the principles behind LCMs,including the integration of liquid crystal materials with metasurfaces to achieve real-time optical property adjustments.Various applications such as tunable filters,beam steering,and dynamic holography are examined.Additionally,the review covers both contact and non-contact LCMs,outlining the mechanisms of phase modulation and information channel switching.The challenges and future prospects of LCMs in enhancing optical communication,sensing,and display technologies are also discussed,providing a comprehensive overview of this cuttingedge field.