FDTD approach to optical forces of tightly focused vector beams on metal particles

被引：28
|
作者：
Qin, Jian-Qi
Wang, Xi-Lin
Jia, Ding
Chen, Jing
Fan, Ya-Xian
Ding, Jianping [1 ]
Wang, Hui-Tian
机构：
[1] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China
来源：
OPTICS EXPRESS | 2009年 / 17卷 / 10期
关键词：
DIELECTRIC SPHERE; CONFINEMENT; TWEEZERS; FIELD;
D O I：
10.1364/OE.17.008407
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose an improved FDTD method to calculate the optical forces of tightly focused beams on microscopic metal particles. Comparison study on different kinds of tightly focused beams indicates that trapping efficiency can be altered by adjusting the polarization of the incident field. The results also show the size-dependence of trapping forces exerted on metal particles. Transverse tapping forces produced by different illumination wavelengths are also evaluated. The numeric simulation demonstrates the possibility of trapping moderate-sized metal particles whose radii are comparable to wavelength. (C) 2009 Optical Society of America
引用
收藏
页码：8407 / 8416
页数：10
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