Electromagnetic scattering by a uniaxial anisotropic sphere located in an off-axis Bessel beam

被引：32

作者：

Qu, Tan ^{[1
]}

Wu, Zhen-Sen ^{[1
]}

Shang, Qing-Chao ^{[1
]}

Li, Zheng-Jun ^{[1
]}

Bai, Lu ^{[1
]}

机构：

[1] Xidian Univ, Sch Sci, Xian 710071, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2013年 / 30卷 / 08期

基金：

中国国家自然科学基金;

关键词：

LORENZ-MIE THEORY; VORTEX BEAM; LOCALIZED APPROXIMATION; ARBITRARY SCATTERING; ACOUSTIC SCATTERING; SHAPE COEFFICIENTS; RIGID SPHERE; ORDER; FORCE; GAUSS;

D O I：

10.1364/JOSAA.30.001661

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Electromagnetic scattering of a zero-order Bessel beam by an anisotropic spherical particle in the off-axis configuration is investigated. Based on the spherical vector wave functions, the expansion expression of the zero-order Bessel beam is derived, and its convergence is numerically discussed in detail. Utilizing the tangential continuity of the electromagnetic fields, the expressions of scattering coefficients are given. The effects of the conical angle of the wave vector components of the zero-order Bessel beam, the ratio of the radius of the sphere to the central spot radius of the zero-order Bessel beam, the shift of the beam waist center position along both the x and y axes, the permittivity and permeability tensor elements, and the loss of the sphere on the radar cross section (RCS) are numerically analyzed. It is revealed that the maximum RCS appears in the conical direction or neighboring direction when the sphere is illuminated by a zero-order Bessel beam. Furthermore, the RCS will decrease and the symmetry is broken with the shift of the beam waist center. (C) 2013 Optical Society of America

引用

页码：1661 / 1669

页数：9

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