Perturbation between two traps in dual-trap optical tweezers

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	Perturbation between two traps in dual-trap optical tweezers
	Ling, L ; Zhou, F ; Huang, L ; Guo, HL ; Li, ZL ; Li, ZY
刊名	JOURNAL OF APPLIED PHYSICS
	2011
卷号	109 期号:8
关键词	RESONANCE DIPOLE FORCE FIELD
ISSN号	0021-8979
通讯作者	Li, ZY (reprint author), Chinese Acad Sci, Inst Phys, Lab Opt Phys, POB 603, Beijing 100190, Peoples R China.
中文摘要	Dual-trap optical tweezers are widely used in biological sciences and many other areas. The two traps are generally considered to be independent of each other in most situations. But when they are close and even touch side by side, the influence may not be negligible. We calculate the optical force of dielectric spherical particles trapped in dual-trap optical tweezers by means of the discrete dipole approximation method and analyze the perturbation effect between the two traps. We find that the electric field does not change much when it is scattered by the trapped particles. As a result, the scattering light from one sphere has a little perturbation effect on the trapping force upon the other sphere. The perturbation mainly comes from the other trap and is thus affected by the distance between the two traps. In the experiment, the displacement of the sphere trapped in an immovable trap is observed when another trap is moving close. The experiment data of relative displacement match qualitatively with the calculation data. (C) 2011 American Institute of Physics. [doi:10.1063/1.3582058]
收录类别	SCI
资助信息	National Natural Science Foundation of China [10634080]; National Basic Research Foundation of China [2007CB935703]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/50705]
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. Perturbation between two traps in dual-trap optical tweezers[J]. JOURNAL OF APPLIED PHYSICS,2011,109(8).
APA	Ling, L,Zhou, F,Huang, L,Guo, HL,Li, ZL,&Li, ZY.(2011).Perturbation between two traps in dual-trap optical tweezers.JOURNAL OF APPLIED PHYSICS,109(8).
MLA	Ling, L,et al."Perturbation between two traps in dual-trap optical tweezers".JOURNAL OF APPLIED PHYSICS 109.8(2011).