基于焦散线方法的自加速光束设计

发布时间：2018-11-25 21:53

【摘要】：以艾里光束为代表的自加速光束是一类在自由空间中具有弯曲传播特性的新型特殊光束.这类光束因其具有无衍射、自加速和自修复等奇异特性引起了人们的广泛关注,有望应用于光学微粒操控、激光微加工、全光路由和超分辨成像等诸多领域.由于艾里光束只能沿着抛物线的轨迹传播,限制了其在实际应用中的灵活性,因而设计出能够沿着不同轨迹传播的自加速光束是这一研究领域的关键问题,而基于焦散线方法的自加速光束设计是解决该问题的有效途径之一.这一方法是将设计的传播轨迹与光学焦散线联系起来,通过分析形成该焦散线所需的光线簇构造出对应的初始场分布.基于该原理并经过不断发展,不同类型的自加速光束相继得以实现,并且借助维格纳函数还可以同时实现实空间和傅里叶空间的自加速光束设计,为自加速光束的应用提供了更多的可能性.本文对基于焦散线方法的自加速光束设计原理和进展进行全面介绍.
[Abstract]:The self-accelerating beam represented by Ellie beam is a new kind of special beam which has the characteristic of bending propagation in free space. Due to their unique characteristics such as non-diffraction, self-acceleration and self-repair, this kind of beam is expected to be used in many fields, such as optical particle manipulation, laser micromachining, all-optical routing and super-resolution imaging. The design of self-accelerating beams that can propagate along different trajectories is a key problem in this field, because the Airie beam can only propagate along the path of parabola, which limits its flexibility in practical applications. The design of self-accelerating beam based on caustic line method is one of the effective ways to solve this problem. In this method, the designed propagation trajectory is associated with the optical caustic line, and the corresponding initial field distribution is constructed by analyzing the ray clusters needed to form the caustic line. Based on this principle and through continuous development, different types of self-accelerating beams can be realized one after another, and the design of self-accelerating beams in real space and Fourier space can also be realized with the help of Wigner function. It provides more possibilities for the application of self-accelerating beams. The principle and progress of self-accelerating beam design based on caustic line method are introduced in this paper.
【作者单位】：中山大学电子与信息工程学院光电材料与技术国家重点实验室;布里斯托大学电气与电子工程系;
【基金】：国家重点基础研究发展计划(批准号:2014CB340000) 国家自然科学基金(批准号:11690031,61323001,61490715,51403244) 广州市科技计划科学研究一般项目(批准号:2018) 中山大学高校基本科研业务费青年教师重点培育项目(批准号:17lgzd06,16lgjc16,15lgpy04,15lgzs095,15lgjc25)资助的课题~~
【分类号】：O43

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