椭球体等形状介质的退极化因子  

The depolarization factors of dielectric ellipsoid and other shapes

作　　者：王本阳 毛晓芹 王新顺 张立彬 WANG Benyang;MAO Xiaoqin;WANG XinShun;ZHANG Libin(Department of Optoelectronic Science,School of Science,Harbin Institute of Technology,Weihai,Shandong 264209,Chin)

机构地区：[1]哈尔滨工业大学(威海)理学院光电科学系,山东威海市264209

出　　处：《大学物理》2018年第5期30-34,共5页College Physics

摘　　要：利用离散偶极子近似和电静态近似的方法研究了具有代表性的椭球体、圆柱体、立方体和其余5种形状介质粒子的吸收效率因子或内部电场,计算了外电场沿不同方向时粒子的退极化因子,阐明了得到任意形状粒子的退极化因子的简易方法.该计算结果可以加深学生对介质形状和退极化场大小关系的理解,并对介质的退极化因子的研究提供一定的参考.The scattering efficiency factors or internal electric fields of the representative ellipsoid,cylinder,cube and other five kinds of particle shapes are investigated by discrete dipole approximation and electrostaticapproximation methods,and the depolarization factors under external electric field in different directions arecalculated. Furthermore,a simple method to obtain the depolarization factor of a dielectric particle in differentshape is given. The results can help students understand the relationship between the shape of medium and theintensity of depolarization field,and it also provides some references for the study of depolarization factor.

关 键 词：椭球体 圆柱体 离散偶极子近似 退极化场 退极化因子 

分 类 号：O441.6[理学—电磁学]