新型椭圆矢量空心光束中瑞利粒子的操控理论  

Theory on Manipulation of Rayleigh Particles in New Elliptical Vector Hollow Beams

作　　者：曹萌 周婧雯 汤继鸿 裴春莹 尹亚玲 Cao Meng;Zhou Jingwen;Tang Jihong;Pei Chunying;Yin Yaling(State Key Laboratory of Precision Spectroscopy, Faculty of Physics and Materials Sciences, East China Normal University, Shanghai 200062, China)

机构地区：[1]华东师范大学物理与材料科学学院精密光谱科学与技术国家重点实验室,上海200062

出　　处：《激光与光电子学进展》2019年第5期212-217,共6页Laser & Optoelectronics Progress

基　　金：上海市自然科学基金探索类项目(17ZR1443000)

摘　　要：提出了一种利用椭圆矢量空心光束实现瑞利粒子非对称操控的方案。理论计算了椭圆矢量空心光束对放置其中的瑞利粒子作用的散射力和梯度力。以实验产生的椭圆矢量空心光束作为操控光束,以乙酰苯液体中水分子团为研究对象,进行了相关粒子的囚禁动力学理论分析,采用蒙特卡罗方法进行了相关模拟。理论研究结果表明,瑞利粒子在椭圆矢量空心光束中所受散射力的大小远远小于所受梯度力的大小,选择合适的光强可以将瑞利粒子囚禁在光束非对称空心部分。A scheme for asymmetric manipulation of Rayleigh particles using elliptical vector hollow beams is presented. The scattering force and the gradient force of the elliptical vector hollow beams on the Rayleigh particle which are in these beams are theoretically calculated. Taking the elliptical vector hollow beams produced in the experiment as the manipulating beams, and taking the water molecules group in acetyl benzene liquid as the research object, the theoretical analysis of the trapping dynamics of the related particles is carried out, and the Monte-Carlo method is used to simulate the trapping dynamics. The theoretical research results show that the scattering force onto the Rayleigh particles in elliptical vector hollow beams is much smaller than that of the gradient forces. The Rayleigh particle can be trapped in the asymmetrical hollow part of the beam by choosing the appropriate light intensity.

关 键 词：物理光学 椭圆矢量空心光束 瑞利粒子 梯度力 

分 类 号：O436[机械工程—光学工程]