离轴超构透镜设计与特性分析  

Design and characteristic analysis of off-axis meta-lens

作　　者：胡金高娃 赵尚男 王灵杰[1] 叶昊坤 张建萍[1] 张新[1,2] HU Jin-gao-wa;ZHAO Shang-nan;WANG Ling-jie;YE Hao-kun;ZHANG Jian-ping;ZHANG Xin(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《中国光学（中英文）》2024年第1期52-60,共9页Chinese Optics

基　　金：国家自然科学基金项目(No.62005271)。

摘　　要：本文提出了一种离轴超构透镜的设计方法,并分析了不同数值孔径、离轴角度等参数对于离轴超构透镜的光谱分辨率、聚焦效率以及仿真结果的影响。利用Lumerical软件分别仿真了参数为NA=0.408、α=13°;NA=0.180、α=13°及NA=0.408α=20°等多个离轴超构透镜。仿真结果表明:离轴角度与光谱分辨率大小成正相关,离轴角度越大,光谱分辨能力越强,但聚焦效率越低;数值孔径越小,相位分布的覆盖范围越小,会导致仿真聚焦位置与理论值偏差变大。设计者需要根据需求合理平衡数值孔径、离轴角度等参数,最终实现理想效果。本文得出的结论对离轴超构透镜的理论分析和实际应用中的参数设计具有重要参考价值。We propose a design method for off-axis meta-lens and analyze the effects of numerical aperture,off-axis angle,and incident wavelength on the simulation deviation,resolution and focusing efficiency of off-axis meta-lenses.Several off-axis meta-lenses with parameters NA=0.408α=13°,NA=0.180α=13°,NA=0.408α=20°were simulated by Lumerical,respectively.The simulation results indicate that the off-axis angle is directly proportional to the spectral resolution.As the angle increases,the spectral resolution becomes better,but the focusing efficiency decreases.A smaller numerical aperture result in a smaller coverage of the phase distribution,leading to a larger deviation between the simulation and theory.Designers need to reasonably balance parameters such as numerical aperture and off-axis angle according to the requirements to finally achieve the desired effect.This study has an important reference value for theoretical analysis and parameter design of off-axis meta-lens in practical application.

关 键 词：超构透镜 离轴超构透镜 仿真分析 

分 类 号：O436.1[机械工程—光学工程] TH74[理学—光学]