基于波长调控的变焦超分辨氧化石墨烯超透镜  

Vari-focal Super-resolution Graphene Oxide Metalens Based on Wavelength Modulation

作　　者：丁永昌 李雪岩 吴益剑 张烈山 常頔 DING Yongchang;LI Xueyan;WU Yijian;ZHANG Lieshan;CHANG Di(Precision Measurement Laboratory,School of Information Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;School of Computer Science and Artificial Intelligence,Wenzhou University,Wenzhou 325000,China)

机构地区：[1]浙江理工大学信息科学与工程学院精密测量实验室,杭州310018 [2]温州大学计算机与人工智能学院,温州325000

出　　处：《光子学报》2025年第3期160-171,共12页Acta Photonica Sinica

基　　金：国家自然科学基金(No.62405282);浙江省自然科学基金(No.LQ23F050014)。

摘　　要：提出了一种基于遗传算法的波长调控轴向变焦超分辨氧化石墨烯超透镜系统设计方法。利用氧化石墨烯和还原氧化石墨烯材料相位幅度依赖关系,对入射光相位、振幅进行同时调控,以实现基于入射光波长调控的超分辨光学变焦。采用遗传算法根据预设目标和优化约束条件对氧化石墨烯超透镜的环结构参数进行逆向设计。仿真结果表明,在432~632 nm的工作波长范围内,氧化石墨烯超透镜径向分辨率均小于衍射极限,同时焦距随工作波长在201.6~318.8μm范围内可调,最大聚焦效率为82.07%,平均聚焦效率为57.53%。设计的氧化石墨烯超透镜通过对入射光相位和振幅的精确调控,实现了快速、连续、可重复变焦和超分辨聚焦的效果,可为微型化、集成化和非机械移动的光学变焦系统提供一种新的途径。The large size of traditional optical lenses limits their application in compact image sensors.In recent years,graphene oxide metalens have promoted the development of optical lenses toward miniaturization and integration.Since the inherent diffraction properties of graphene oxide metalens lead to the phenomenon of chromatic aberration,optical zoom based on wavelength modulation can be realized by using chromatic aberration as a new dimension,which can achieve the effect of continuous repeatable zoom without moving the optical components and only by changing the wavelength of the incident light.In this paper,a wavelength-modulated axial zoom super-resolution graphene oxide metalens system design method based on a genetic algorithm is proposed.By utilizing the phase-amplitude dependence of graphene oxide and reduced graphene oxide materials,phase and amplitude are simultaneously modulated to achieve super-resolution focusing based on incident light wavelength modulation.In the operating wavelength range of 432~632 nm,the objective function is set to the incident light of different wavelengths has the maximum optical field intensity at the preset focal length,and the wavelength-modulated optical zoom can be realized by using this objective function.During the optimization design process,the radius of the graphene oxide metalens is fixed at 150μm,and the numerical aperture can be increased by decreasing the focal length,which in turn improves the imaging resolution,so the optimization constraints of the minimum numerical aperture requirement are introduced,and by setting the minimum numerical aperture to 0.4,the super-resolution focusing can be achieved in the operating wavelength range of 432~632 nm.Genetic algorithms were then used to inverse design the ring structure parameters of the graphene oxide metalens based on the predefined objectives and optimization constraints.During the optimization process of the genetic algorithm,selection,crossover and mutation are continuously performed,and the algorithm will sto

关 键 词：光学设计 氧化石墨烯超透镜 遗传算法 相位振幅调控 波长调控光学变焦 超分辨聚焦 

分 类 号：TB34[一般工业技术—材料科学与工程] O439[机械工程—光学工程]