各向异性非球形粒子对厄米高斯波束的散射及扭矩研究

项目名称： 各向异性非球形粒子对厄米高斯波束的散射及扭矩研究

项目编号： No.61308025

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 李正军

作者单位： 西安电子科技大学

项目金额： 25万元

中文摘要： 基于广义Mie理论，波束的角谱展开方法，复源点方法，各类矢量波函数的相互转换和矢量场展开技术、加法定理与坐标旋转定理，研究各向异性球形/非球形粒子对任意方向入射不同阶厄米高斯波束的散射，数值计算其散射特性。结合特殊函数的正交递推和近似关系，研究在轴、离轴及离轴斜入射厄米高斯波束作用在各向异性球形/非球形粒子上的辐射力和扭矩，数值分析波束参数，各向异性参数，尺寸参数及轴向比等对辐射力和扭矩的影响，研究双/多束厄米高斯波束组成的牵引波束对各向异性球形/非球形粒子的辐射力和扭矩特性。应用微分关系，研究高阶厄米高斯波束对各向异性球形/非球形粒子辐射力和扭矩特性，分析波束参数的影响。进一步或可研究由不同阶厄米高斯波束线性叠加成的涡旋波束对各向异性球/非球粒子的辐射力和扭矩特性。给出上述问题的物理解释，可将研究成果应用于生物细胞、粒度分析、大气环境检测、光镊技术等领域。

中文关键词： 有形波束散射；激光与光散射；辐射力和扭矩；各向异性煤质；椭球粒子

英文摘要： Based on Generalized Lorenz-Mie Theory(GLMT), expansion method of the angular spectrum, complex-source-point method, the transformation and expansion approaches of various vector wave functions, addition theorem and coordinate rotation theory of the spherical vector wave functions, analytical solutions of the scattering of different modes Hermite-Gaussian beam with airbitrary incident direction are investigated, the scattering properties are numerically analyzed. Applying orthogonality relations and approximate relations of special functions, the radiation force and torque exerted on an anisotropic sphercial/non-spherical particle by an on-axis, off-axis or off-axis oblique incidicent Hermite-Gaussian beam are investigated. The effects of beam parameters, anisotropy parameters, size parameter and axis ratios etc. on the radiation forces and torques are numerically analyzed in detail.The radiation force and torque exerted on an spherical/non-spherical particle by a draw beam consist of double/multiple Hermite-Gaussian beams are researched theoretically. Utilizing differentical relations, the radiation force and torque exerted on an anisotropic sphereical/non-spherical particle by an higher-order Hermite-Gaussian beam are investigated, the effects of beam parameters on the radiation force and torque are numericall

英文关键词： shaped beam scattering；laser and light scattering；radiation force and torque；anisotropic medium；spheroidal particle