Equilibrium orientations and positions of non-spherical particles in optical traps

被引：41
作者：
Cao, Yongyin [1 ,2 ]
Stilgoe, Alexander B. [2 ]
Chen, Lixue [1 ]
Nieminen, Timo A. [2 ]
Rubinsztein-Dunlop, Halina [2 ]
机构：
[1] Harbin Inst Technol, Sch Sci, Dept Phys, Harbin 150001, Peoples R China
[2] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 12期
基金：
澳大利亚研究理事会;
关键词：
ROTATION; TWEEZERS; MANIPULATION; FORCES; TORQUE;
D O I：
10.1364/OE.20.012987
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Dynamic simulation is a powerful tool to observe the behavior of arbitrary shaped particles trapped in a focused laser beam. Here we develop a method to find equilibrium positions and orientations using dynamic simulation. This general method is applied to micro- and nano-cylinders as a demonstration of its predictive power. Orientation landscapes for particles trapped with beams of differing polarisation are presented. The torque efficiency of micro-cylinders at equilibrium in a plane is also calculated as a function of tilt angle. This systematic investigation elucidates in both the function and properties of micro- and nano-cylinders trapped in optical tweezers. (C) 2012 Optical Society of America
引用
收藏
页码：12987 / 12996
页数：10
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