椭球体等形状介质的退极化因子

王本阳; 毛晓芹; 王新顺; 张立彬

doi:10.16854 /j.cnki.1000-0712.170300

大学物理 >

2018 , Vol. 37 >Issue 5: 30 - 34

DOI: https://doi.org/10.16854 /j.cnki.1000-0712.170300

教学讨论

椭球体等形状介质的退极化因子

王本阳 ,
毛晓芹 ,
王新顺 ,
张立彬

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哈尔滨工业大学(威海) 理学院光电科学系，山东威海市264209

王本阳(1979—)，男，山东威海人，哈尔滨工业大学(威海)理学院光电科学系讲师，博士，主要从事基础

收稿日期: 2017-05-22

修回日期: 2017-10-16

网络出版日期: 2018-05-20

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The depolarization factors of dielectric ellipsoid and other shapes

WANG Ben-yang ,
MAO Xiao-qin ,
WANG Xin-Shun ,
ZHANG Li-bin

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Department of Optoelectronic Science，School of Science，Harbin Institute of Technology，Weihai，Shandong 264209，China

Received date: 2017-05-22

Revised date: 2017-10-16

Online published: 2018-05-20

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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.

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

本文引用格式

王本阳 , 毛晓芹 , 王新顺 , 张立彬 . 椭球体等形状介质的退极化因子[J]. 大学物理, 2018 , 37(5) : 30 -34 . DOI: 10.16854 /j.cnki.1000-0712.170300

Abstract

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 electrostatic approximation methods，and the depolarization factors under external electric field in different directions are calculated. Furthermore，a simple method to obtain the depolarization factor of a dielectric particle in different shape is given. The results can help students understand the relationship between the shape of medium and the intensity of depolarization field，and it also provides some references for the study of depolarization factor.

Key words： ellipsoid; cylinder; discrete dipole approximation; depolarization field; depolarization factor

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