紧聚焦光场的空间结构测量、调控和应用研究

项目名称： 紧聚焦光场的空间结构测量、调控和应用研究

项目编号： No.61205018

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 谢向生

作者单位： 中山大学

项目金额： 28万元

中文摘要： 本项目拟实验研究调控光场的紧聚焦特性及其应用，开发可靠的紧聚焦光斑三维测量系统和多参量空间光调制（振幅、相位、偏振等）装置，以实现传统焦斑测量、新型焦斑开发和多样化焦斑实时可调。并结合自适应反馈控制算法和软件，尝试极小尺度光斑和特殊光斑自动寻找和逼近。本项目拟通过硅片破碎法制备双刀边探针，将现有刀边扫描法的一维测量发展至二维甚至三维，以满足非轴对称焦斑的测量需要。拟通过多个空间光调制器、波片和相位掩膜板的设计组合，将空间光调制的紧聚焦特性研究从柱对称矢量光场调制推广至多个参量的同时调制。本项目是集电子与计算机控制、光电测量、自适应算法优化和精密光机电系统等高新技术的综合实验技术。项目研究成果可应用于紧聚焦仪器装置的性能测试和定标，如共聚焦显微镜、激光直写仪等；也可应用于开发新型光学镊子，超分辨光学显微镜等。项目将为光场聚焦理论提供可靠的实验佐证，也为纳米光子学发展提供技术储备。

中文关键词： 紧聚焦；空间光调制；刀边扫描法；超分辨；

英文摘要： The topic of this project is experimental study on optical tightly focused beam with multiple spatial light modulations. An accuracy measurement system for tightly focused beam will be designed and assembled. A setup for spatial light modulation with multiple adjustable parameters, including amplitude, phase, polarization etc, will be designed. Both instruments will be used to measure the traditional focus beams, develop new types of focus beams and real time control of focus beams. Minimal or special beams profiles will be self-searched with a self-adaptive algorithm and a servo control system. The probes of the measurement system will be fabricated by silicon wafer fragments with double knife-edges, which will extend the present knife-edge scanning method from 1-dimentional measurement into 2-dimentional. Hence the measurement for non axial symmetric focus beam will be realized. The setup for spatial light modulation will be combined with modulators, wave plates and optical masks. By uniting different devices, different parameters will be adjustable and the profiles of tightly focus beam will be studied. This is an experimental project combining with multiple high techniques, including electronics, computer control, photonic measurement, self-adaptive algorithm and optical-mechanical-electrical system. The

英文关键词： tightly focused；spacial light modulation；knife-edge scanning method；superresoltion；