Theoretical study of the trapping efficiency of an optical tweezers array system  

作　　者：李勤 冯万力 胡晓明 曹群 沙定国 林家明 

机构地区：[1]Department of Biomedical Engineering,Beijing Institute of Technology [2]Department of Opto-electronic Engineering,Beijing Institute of Technology

出　　处：《Chinese Physics B》2008年第2期726-735,共10页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No 20505002);the Excellent Young Scholars Research Fund of Beijing Institute of Technology (Grant No 000Y06-23);the Excellent Scholars Research Fund of Beijing(Grant No 20071D1600300394)

摘　　要：Optical tweezers have been a valuable research tool since their invention in the 1980s. One of the most important developments in optical tweezers in recent years is the creation of two-dimensional arrays of optical traps. In this paper, a method based on interference is discussed to form gradient laser fields, which may cause the spatial modulation of particle concentration. The parameters related to the optical tweezers array are discussed in detail and simulated by the Matlab software to show the influence of important parameters on the distribution of particle concentration. The spatial redistribution of particles in a laser interference field can also be predicted according to the theoretical analysis.Optical tweezers have been a valuable research tool since their invention in the 1980s. One of the most important developments in optical tweezers in recent years is the creation of two-dimensional arrays of optical traps. In this paper, a method based on interference is discussed to form gradient laser fields, which may cause the spatial modulation of particle concentration. The parameters related to the optical tweezers array are discussed in detail and simulated by the Matlab software to show the influence of important parameters on the distribution of particle concentration. The spatial redistribution of particles in a laser interference field can also be predicted according to the theoretical analysis.

关 键 词：optical tweezers array gradient force trapping efficiency spatial modulation 

分 类 号：O439[机械工程—光学工程]