摘要
基于光子的自旋霍尔效应,超表面可用于光束的产生和控制。本文基于旋转变换利用一维纳米孔链设计了二维纳米孔旋转对称超表面。利用此样品,可以由左旋圆偏振(LCP)和右旋圆偏振(RCP)光的自旋霍尔效应同时产生贝塞尔光束。利用线偏振光激发,通过控制两个圆偏振光激发光束之间的相干干涉可动态调控贝塞尔光束的强度和偏振。同时,此方法还具有宽带调制的优点。
Based on the spin Hall effect of photons,a metasurface can be used to generate and control light beams.In this paper,by means of one-dimensional chains of nanohole,a metasurface with rotational symmetry is designed.The Bessel beam can be produced by the spin Hall effect of Left-handed Circularly Polarized(LCP)and Right-handed Circularly Polarized(RCP)light simultaneously.Through the excitation of linearly polarized light,we can dynamically control the intensity and polarization of Bessel beam by controlling the coherent interference between two circularly polarized light excitation beams.At the same time,this method has the advantage of broadband modulation range.
作者
于洋
仲帆
江西
褚琼琼
祝世宁
刘辉
YU Yang;ZHONG Fan;JIANG Xi;CHU Qiong-Qiong;ZHU Shi-Ning;LIU Hui(National Laboratory of Solid State Microstructures,School of Physics,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing,210093,China;School of Physics,Southeast University,Nanjing 211189,China)
出处
《中国光学》
EI
CAS
CSCD
北大核心
2021年第4期927-934,共8页
Chinese Optics
基金
国家自然科学基金(No.11690033,No.61425018,No.11621091,No.12004072)
江苏省自然科学基金(No.BK20200388)
国家重点研发项目(No.2017YFA0205700,No.2017YFA0303702)资助。
关键词
动态可控贝塞尔光束
超表面
宽带调制范围
dynamically controllable bessel beam
metasurface
broadband modulation range
