环带离散化平面透镜的设计与研究  

Design and study of plane lens with band discretization

作　　者：蒲欣欣 侯劲尧 郭文浩 孙雪平[1] 谢一博 程进 周顺[1] 刘卫国[1] PU Xinxin;HOU Jinyao;GUO Wenhao;SUN Xueping;XIE Yibo;CHENG Jin;ZHOU Shun;LIU Weiguo(School of Opto-Electronical Engineering,Xi'an University of Technology,Xi'an 710021,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021

出　　处：《应用光学》2025年第2期269-275,共7页Journal of Applied Optics

基　　金：国家外国专家项目(G2023041018L);陕西省教育厅专项科研计划(22JK0415)。

摘　　要：超透镜和多级衍射透镜(multi-diffraction-lenses,MDL)成像在聚焦应用中发挥着至关重要的作用,但超透镜在大口径和加工方面受到限制,且多级衍射透镜在透过率方面也无法实现真正意义上的高透过率。针对上述问题,设计了单层环带离散型平面透镜,通过超透镜的多个单元结构代替多级衍射透镜每一个环带的方式,以高折射率材料Si作为相位调控单元和基底,成功实现了多级衍射透镜的环带离散化;另外,对比分析了环带离散型平面透镜、超透镜和多级衍射透镜的结构特性和光学性能。最终的仿真结果表明:环带离散型平面透镜不仅实现了光束聚焦,同时具有76%的透过率,相比于多级衍射透镜提升了25.3%;其结构的最大深宽比为8.9∶1,相比超透镜降低了50.5%,在批量加工方面具有重要意义。环带离散型平面透镜同时具备超透镜和多级衍射透镜的优势,在光学系统集成、红外成像、光学传感等领域中展现出广阔的应用前景。Metalenses and multi-diffraction-lenses(MDL)play a crucial role in focusing imaging applications.However,metalenses have their own limitations in terms of large aperture and processing,and MDL are unable to achieve truly high transmittance in terms of transmittance.Aiming at the above problems,a single-layer ring band discretized planar lens was designed by replacing each ring band of a MDL with multiple unit structures of a metalens,and the ring band discretisation of a MDL was successfully realised by using Si,a high refractive index material,as the phase modulation unit and the substrate.In addition,the structural properties and optical performances of the ring-band discretized planar lens,metalens and MDL were compared and analyzed.The results of simulation show that the ring-band discretized planar lens not only achieves beam focusing,but also has a high transmittance of 76%,which is 25.3%higher than that of the MDL.The maximum depth-to-width ratio of the structure is 8.9:1,which is 50.5%lower than that of the metalens,and it has certain advantages in batch processing.The band discretized planar lens has the advantages of both metalens and MDL,and shows a broad application prospect in optical system integration,infrared imaging,optical sensing,and other important fields.

关 键 词：超透镜 多级衍射透镜 相位调控单元 平面透镜 

分 类 号：TN216[电子电信—物理电子学] O439[机械工程—光学工程]