Optically trapping Rayleigh particles by using focused partially coherent multi-rotating elliptical Gaussian beams  

作　　者：彭喜 陈迟到 陈波 彭玉莲 周美玲 杨相波 邓冬梅 

机构地区：[1]Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices,South China Normal University [2]CAS Key Laboratory of Geospace Environment, University of Science & Technology of China,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2016年第1期65-69,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 11374108, 10904041, and 11374107);the Foundation for the Author of Guangdong Province Excellent Doctoral Dissertation (No. SYBZZXM201227);the Foundation of Cultivating Outstanding Young Scholars (“Thousand, Hundred, Ten” Program) of Guangdong Province in China;Support was also provided by the CAS Key Laboratory of Geospace Environment, University of Science and Technology of China

摘　　要：By investigating the cross-spectral density of partially coherent multi-rotating elliptical Gaussian beams （REGBs） that propagate through a focusing optical system, we obtain the radiation force on a Rayleigh particle. The radiation force distribution is studied under different beam indexes, coherence widths, and elliptical ratios of the partially coherent multi REGBs. The transverse and the longitudinal trapping ranges can increase at the focal plane by increasing the beam index or decreasing the coherence width. The range of the trapped particle radii increases as the elliptical ratio increases. Furthermore, we analyze the trapping stability.By investigating the cross-spectral density of partially coherent multi-rotating elliptical Gaussian beams （REGBs） that propagate through a focusing optical system, we obtain the radiation force on a Rayleigh particle. The radiation force distribution is studied under different beam indexes, coherence widths, and elliptical ratios of the partially coherent multi REGBs. The transverse and the longitudinal trapping ranges can increase at the focal plane by increasing the beam index or decreasing the coherence width. The range of the trapped particle radii increases as the elliptical ratio increases. Furthermore, we analyze the trapping stability.

关 键 词：Optical systems Spectral density 

分 类 号：O436[机械工程—光学工程]