任意凸加速光涡的传播动力学研究及其在微粒操控中的应用

项目名称： 任意凸加速光涡的传播动力学研究及其在微粒操控中的应用

项目编号： No.11204208

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 戴海涛

作者单位： 天津大学

项目金额： 30万元

中文摘要： 本项目基于理论和实验方法系统研究叠加在任意凸加速光场中的光涡的传播动力学特征。系统阐述光涡在凸加速光场中的演变规律(如光涡的横向偏移速度、光涡的运行轨迹、光涡的角动量同凸加速光束局域角动量间的相互作用等）；优化凸加速光束的物理参数（如光束的出射角度，凸曲线的阶次等）使得光涡所形成的光强暗斑中心和凸加速光束的主瓣重合而实现具有横向加速特征的光涡（凸加速光涡）；研制一种可精确控制光涡位置的凸加速光涡实验生成技术，其光路系统具有紧凑、灵活、易于集成等优点；基于混合光束角动量谱的测量技术揭示凸加速光涡传播过程中光涡和凸加速光束局域角动量之间的相互作用和传递规律；利用凸加速光涡实现不同特性微粒的捕获和操控。通过本项目的研究，将更深入的揭示光学轨道角动量的传播、相互作用的规律；同时也将丰富和扩展横向加速及凸加速光场及光涡的研究内容和应用范围。

中文关键词： 凸加速光束；光涡；粒子操控；突然聚焦光束；光力

英文摘要： The project is proposed to study the dynamcis propagation of the optical vortex that is superimposed in an arbitrary convext accelerating beams (CABs) both theoretically and experimentally. The law of evolution of the optical vortex in convex accelerating beams, such as the transverse velocity of the optical vortex,the trajectories of the optical vortex,the interference of the optical angular momentum (OAM) between the optical vortex and the CABs,will be sysmetic depicted. Meanwhile, the physical parameters of the CABs, i.e. the firing angle of the CABs, the order of the CABs etc., will be optimized to match the dark center of the optical vortex and the center of the major lobe of the CABs. Therefore, the optical vortex with accelerating property (named as convex accelerating optical vortex) will be achieved. The experimental configuration to generate the convex accelearting optical vortex (CAOVs) will be developed, which is compact, flexible and easy integrating. And the technique to measure the spectrum of OAM of the hybird beams will also developed to depict the interaction and transfer between the OAM of optical vortex and the local OAM of convext accelerating beams. At last the CAOVs will be applied to manipulate and trap the microparticles with various properties. The achievements of this project will furt

英文关键词： accelerating convex beam；optical vortex；particles manipulation；abruptly focusing beam；optical force