Radiation forces exerted on redundant particles on optical surface by oblique incident and off-axis Gaussian laser beams

GONG Lei; WU Zhen-sen; LI Zheng-jun

doi:10.3788/OPE.20142202.0289

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Radiation forces exerted on redundant particles on optical surface by oblique incident and off-axis Gaussian laser beams

Modern Applied Optics | 更新时间：2020-08-13

- Radiation forces exerted on redundant particles on optical surface by oblique incident and off-axis Gaussian laser beams
- Optics and Precision Engineering Vol. 22, Issue 2, Pages: 289-295(2014)
- 作者机构：
  
  1. 西安工业大学光电工程学院,陕西西安,710032
  2. 西安电子科技大学理学院,陕西西安,710071
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142202.0289
  CLC： O436.2;TN249
- Received：13 June 2013，
  
  Published：20 February 2014
- 稿件说明：
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巩蕾,吴振森,李正军. 光学表面冗余粒子在离轴及斜入射高斯波束作用下的辐射力[J]. 光学精密工程, 2014,22(2): 289-295

GONG Lei, WU Zhen-sen, LI Zheng-jun. Radiation forces exerted on redundant particles on optical surface by oblique incident and off-axis Gaussian laser beams[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 289-295
巩蕾,吴振森,李正军. 光学表面冗余粒子在离轴及斜入射高斯波束作用下的辐射力[J]. 光学精密工程, 2014,22(2): 289-295 DOI： 10.3788/OPE.20142202.0289.

GONG Lei, WU Zhen-sen, LI Zheng-jun. Radiation forces exerted on redundant particles on optical surface by oblique incident and off-axis Gaussian laser beams[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 289-295 DOI： 10.3788/OPE.20142202.0289.

摘要

针对光学表面冗余粒子的清除问题

通过离轴高斯波束的球矢量波束展开方法

研究了介质球对离轴及斜入射高斯波束的散射特性;基于得到的结果结合连带勒让德函数的正交递推关系推导了离轴高斯波束对介质球的横向和轴向辐射力的解析表达式

并重点分析了离轴距离和高斯波束斜入射角度分别对轴向辐射力和横向辐射力的影响。结果表明

离轴入射时

在束腰负半轴2 μm处出现一个总力极大值

过束腰零点后5 μm处出现一个反向次大值点;高斯波束斜入射时

辐射力在束腰中心前后各出现一个极大值

随着入射角的增大

曲线整体下移减小

辐射力极大值所对应的

位置固定。得到的结论可用于无损检测工程中

即通过调节高斯波束束腰位置可提高对冗余粒子驱逐和控制的效率。

Abstract

On the basis of spherical vector wave functions and their coordinate rotation theory

the scattering properties of dielectric particles by oblique incident and off-axis Gaussian laser beams were discussed to clean the redundant particles on the optical surface. By utilizing the results of electromagnetic scattering of the sphere

the analytical expressions of the radiation forces exerted on a sphere was derived by an incident Gaussian beam with arbitrary directions of propagation and polarization. The influence of the off-axial position

and incident angle of Gaussian beam on the axial and traverse radiation forces were discussed in detail. The results show that the maximum radiation force appears on the -2 μm and the second maximum radiation force appears on the 5 μm by an off-axis Gaussian beam. The maximum radiation force appears two round the girdling center position. The larger the incident angle

the smaller the radiation force. The position of maximum radiation force is fixed to the on-axis position

. According to the conclusions above

it suggests that adjusting the position of Gaussian beam waist can clear and control the redundant particles more efficiently in the nondestructive examination project.

关键词

Keywords

references

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