Optical forces on arbitrary shaped particles in optical tweezers
文献类型：期刊论文
| 作者 | Ling, L ; Zhou, F ; Huang, L ; Li, ZY |
| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 2010 |
| 卷号 | 108期号:7 |
| 关键词 | DISCRETE-DIPOLE APPROXIMATION FOCUSED LASER-BEAM FIELD TRAP |
| ISSN号 | 0021-8979 |
| 通讯作者 | Ling, L (reprint author), Chinese Acad Sci, Inst Phys, Lab Opt Phys, POB 603, Beijing 100190, Peoples R China. |
| 中文摘要 | Discrete dipole approximation (DDA) method is an efficient method for computing electromagnetic (EM) field of nanometer/micrometer-sized dielectric particles with arbitrary geometric shape and topology. In this work we employ the DDA method to calculate the optical force of dielectric shaped particles embedded in optical tweezers made from focused Gaussian laser beams. The EM force is calculated based on the self-consistent solution of EM field distribution and discrete dipole moment distribution within the particles. The DDA method agrees well with the Mie theory for spherical dielectric particles and this supports the effectiveness of the DDA method in handling optical forces in optical tweezers. The optical force for shaped particles such as cubes, rectangles, cylinders, and core-shell composite particles shows many interesting features. The force strongly depends on the orientation of the particle with respect to the laser beam propagation and polarization direction and the aspect ratio of the anisotropic particle. For a core-shell composite particle the zero-force balance point shifts from the particle center to its two sides. When an additional particle comes close a trapped particle, the perturbation effect strongly depends on the relative location of the center of the focused laser beam with respect to the two particles. Furthermore, the geometry of shaped particles not only affects the magnitude of the optical force but also influences the optical trap stiffness. (C) 2010 American Institute of Physics. [doi:10.1063/1.3484045] |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [10525419, 10634080]; National Basic Research Foundation of China [2007CB935703] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50297]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Ling, L,Zhou, F,Huang, L,et al. Optical forces on arbitrary shaped particles in optical tweezers[J]. JOURNAL OF APPLIED PHYSICS,2010,108(7). |
| APA | Ling, L,Zhou, F,Huang, L,&Li, ZY.(2010).Optical forces on arbitrary shaped particles in optical tweezers.JOURNAL OF APPLIED PHYSICS,108(7). |
| MLA | Ling, L,et al."Optical forces on arbitrary shaped particles in optical tweezers".JOURNAL OF APPLIED PHYSICS 108.7(2010). |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。