厄米-高斯光束对手征介质球的远场散射  

Far-Field Scattering of a Chiral Sphere Located in a Hermite-Gaussian Beam

作　　者：屈檀 吴振森[1,2] 尚庆超 李正军[1] 白璐[1] 

机构地区：[1]西安电子科技大学物理与光电工程学院,陕西西安710071 [2]西安电子科技大学信息感知技术协同创新中心,陕西西安710071

出　　处：《光学学报》2016年第4期313-320,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61172031;61308025;61475123;61571355)

摘　　要：利用复源点方法将厄米-高斯光束展开为球矢量波函数的形式。基于广义洛伦兹米氏理论,应用手征介质球与自由空间分界面处电磁场切向连续的边界条件以及球矢量波函数的正交性,得到手征介质球远区散射场展开系数。研究了厄米-高斯光束对手征介质球的散射特性。数值计算了厄米-高斯光束对手征介质球的远区散射场分布,分析了波束模式、手征参数和手征球尺寸等对散射特性的影响。The expression of Hermite-Gaussian beam in terms of spherical vector wave functions is given with the complex source point method. Based on the generalized Lorenz-Mie theory, the scattering coefficients are obtained by applying the continuous boundary conditions of tangential components of electromagnetic field at the interface between chiral medium and free space. The scattering of Hermite-Gaussian beam by a chiral sphere is investigated. The angle distribution of far region scattering field by a chiral sphere located in the Hermite-Gaussian beam is numerically simulated. The influences of beam mode, chiral parameter and sphere radius on the scattering properties sections are analyzed in detail.

关 键 词：激光光学 手征介质 厄米高斯模 散射 

分 类 号：O438[机械工程—光学工程]