空域模拟光学计算器件的研究进展  

Advances in spatial analog optical computing devices

作　　者：周毅[1] 陈瑞[1] 陈雯洁 马云贵[1] Zhou Yi;Chen Rui;Chen Wen-Jie;Ma Yun-Gui(State Key Laboratory of Modern Optical Instrumentation,International Research Center for Advanced Photonics,College of Optical Science and Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学光电科学与工程学院,现代光学仪器国家重点实验室,国际先进光子学研究中心,杭州310058

出　　处：《物理学报》2020年第15期274-284,共11页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61775195);浙江省自然科学基金(批准号:LZ17A040001);国家重点研发计划(批准号:2017YFA0205700)资助的课题.

摘　　要：空域模拟光学计算器件具备高通量、实时性和低能耗的信息处理能力.光学超构材料结构紧凑、对光波具有强大调控能力,可被用于构建小型化、集成化的空域模拟光学计算器件.目前空域模拟光学计算器件的研究根据设计方法主要分为4F系统法和格林函数法两类.4F系统法需要两个傅里叶变换透镜和一个空间频率滤波器,实际模拟计算过程是在空域完成的,结构较为庞大复杂.格林函数法直接利用特别设计的光学材料的非局域响应在空间频率域实现模拟计算过程,不需要额外的傅里叶变换组件,结构简单.本文按照这两种设计方法介绍了近几年来空域模拟光学计算器件的研究进展,根据计算功能又分为微分器、积分器、方程求解器和空间频率滤波器,阐述了这些器件的设计方法.其后介绍了新近提出的利用自旋轨道耦合作用实现空域模拟一阶微分的计算器件.最后对空域模拟光学计算器件应用场景和研究前景进行了讨论和分析.Spatial analog optical computing devices possess the capability of high-throughput,real-time and lowenergy information processing.Optical metamaterials,which are ultracompact in structure and possess powerful ability to control the light,can be utilized to establish miniatured and integrated spatial analog optical computing devices.The methods of designing the spatial analog optical computing devices could be mainly classified as two kinds—4F system method and Green’s function method.The 4F system method requires two Fourier transform lenses and a spatial frequency filter,where the actual computing procedure is performed in the spatial domain.The 4F system is usually bulky and complicated.The Green’s function method directly leverages the nonlocal response of the carefully tailored optical materials to implement analog computing procedure in the spatial frequency domain and its structure is compact without extra Fourier transform components.Research advances in spatial analog optical computing devices by using these two methods for the last few years are introduced in this paper.These researches could be classified as differentiators,integrators,equation solvers and spatial frequency filters according to the standard of computing functions.The approaches to designing these devices are further demonstrated.Then,computing devices which could realize spatial analog first-order difference by use of the spin-orbit interaction proposed recently are introduced.Finally,application fields and study prospects of spatial analog optical computing devices are discussed and summarized.

关 键 词：空域模拟光学计算 光学信息处理 超构材料 多层膜 

分 类 号：TN713[电子电信—电路与系统] TH74[机械工程—光学工程]