摘要
应用拉普拉斯方程求解静电场中无限长均匀双层圆柱体的电势及电场,并基于散射理论获得该结构颗粒的光学散射、吸收及消光系数.进一步计算了金纳米管的远场光谱和近场分布,其结果与经典的M ie散射理论计算结果完全一致.因此,该理论结果可以很好的被应用于纳米光学研究.
The expressions for the electric potential and electric field of infinite length two-layered cylinder are obtained by solving Laplace equation.Based on the scattering theory,we deduce the optical scattering,absorption and extinction efficiencies for two-layered cylinder,and calculate the far-field spectra and near-field distributions of Au nanotube.It is found that the calculated results are same as that obtained by Mie scattering theory.Thus,our theoretical results can be well used in the studies of nano-optics.
出处
《大学物理》
北大核心
2011年第5期11-13,共3页
College Physics
关键词
静电场
拉普拉斯方程
光散射
金纳米管
static electric field
Laplace equation
scattering
Au nanotube
