Scattering of a focused Laguerre-Gaussian beam by a spheroidal particle

被引：31
|
作者：
Jiang, Yuesong [1 ]
Shao, Yuwei [1 ]
Qu, Xiaosheng [1 ]
Ou, Jun [1 ]
Hua, Houqiang [1 ]
机构：
[1] BeiHang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China
来源：
JOURNAL OF OPTICS | 2012年 / 14卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Laguerre-Gaussian; spheroid; on-axis; scattering; LORENZ-MIE THEORY; SURFACE ELECTROMAGNETIC-FIELDS; ORBITAL ANGULAR-MOMENTUM; LOCALIZED APPROXIMATION; ARBITRARY ILLUMINATION; LIGHT-SCATTERING; NEAR-SURFACE; SYSTEMS; PROFILE; AXIS;
D O I：
10.1088/2040-8978/14/12/125709
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A focused Laguerre-Gaussian beam scattered by a homogeneous prolate spheroidal particle is studied for on-axis incidence. An approach to expanding a focused Laguerre-Gaussian beam in terms of the spheroidal wavefunctions in spheroidal coordinates is presented. By using the localized approximations method, the beam-shape coefficients are evaluated and the results agree with the cases of on-axis incidence. Calculations of the far-field scattering intensity are performed to study the shaped beam scattered by a spheroid, which has different size parameters and eccentricities.
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页数：8
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