小部分带电沙粒散射的瑞利近似
Rayleigh approximation for the scattering of small partially charged sand particles.
作者信息
Li Xingcai, Min Xing, Liu Dandan
出版信息
J Opt Soc Am A Opt Image Sci Vis. 2014 Jul 1;31(7):1495-501. doi: 10.1364/JOSAA.31.001495.
Based on the Rayleigh approximation, this paper presents the electromagnetic scattering properties of the small partially charged isotropic sphere and those of a similar anisotropic sphere and then discusses the effect of surface charges on particles' optical properties. The numerical simulation results show that the surface charges on a charged particle can enhance the scattering of the incident waves, and the effect on an anisotropic charged sphere is much greater than that on an isotropic charged particle. Therefore it is necessary to consider the medium property (isotropic or anisotropic) and electric effects of dust particles in the remote sensing of sandstorms.
基于瑞利近似，本文给出了部分带电的各向同性小球体以及类似的各向异性球体的电磁散射特性，进而讨论了表面电荷对粒子光学特性的影响。数值模拟结果表明，带电粒子上的表面电荷能够增强入射波的散射，并且对各向异性带电球体的影响远大于对各向同性带电粒子的影响。因此，在沙尘暴遥感中考虑沙尘颗粒的介质特性（各向同性或各向异性）和电学效应是很有必要的。
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