微米镍粉在太赫兹波段的Mie散射特性研究  

THz scattering characteristics of micron Ni particle based on Mie light scattering theory

作　　者：罗轶[1] 冯修军[1] 黄婉霞[1] 毛茂[1] 张雅鑫[2] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610064 [2]电子科技大学物理电子学院太赫兹研究中心,四川成都610054

出　　处：《激光与红外》2011年第3期302-305,共4页Laser & Infrared

基　　金：国家"973"重大基础研究项目;国家自然科学基金项目(No.10676110)资助

摘　　要：为研究微米镍粉对太赫兹波的屏蔽效果,本文运用Mie氏散射理论,数值计算了微米镍粉在太赫兹波段的散射特性。研究获得了光学截面与粒子半径和入射波长、散射强度与散射角和粒子尺寸参数x的关系曲线。结果表明,微米镍粉在太赫兹波段的消光作用以散射为主;粒径对镍粉的消光效果有很大影响,可以通过控制粒径来设计具有太赫兹屏蔽效果的材料。随粒径的增大,消光截面先增加再振荡降低最终趋近于一定值;粒径越小散射强度越低且散射光强集中分布在散射角较小的范围内。For studying the shielding effectiveness of micron nickel particle in the THz range,this article based on the Mie scattering theory,the theoretical analysis and numerical calculation of the micron nickel particle′s light scattering characteristics in THz range.we obtained the relationship of the optic section with the particle radius and incident wavelength,the scattering intensity with the scattering angle and the size parameter x.The results show that the micron nickel particle′s extinction function is main on scattering in THz band.With the increase of radius,extinction section increased at first and then oscillation reduction,finally tends to a constant value.The scattering intensity is concentrated in a small range of scattering angle and the smaller the radius,the lower the scattering intensity.

关 键 词：太赫兹 MIE散射 光学截面 散射强度 镍粉 

分 类 号：O436.2[机械工程—光学工程]