文献类型：期刊文献

英文题名：Effect of spatial coherence on propagation, tight focusing, and radiation forces of an azimuthally polarized beam

作者：Dong, Yiming[1,2];Wang, Fei[1];Zhao, Chengliang[1];Cai, Yangjian[1]

机构：[1]Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China;[2]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2012

卷号：86

期号：1

外文期刊名：PHYSICAL REVIEW A

收录：SCI-EXPANDED(收录号：WOS:000306920700014)、、EI(收录号：20123215307277)、Scopus(收录号：2-s2.0-84864429447)、WOS

基金：This work is supported by the National Natural Science Foundation of China under Grants No. 10904102, No. 61008009, and No. 11104195; the Foundation for the Author of National Excellent Doctoral Dissertation of PR China under Grant No. 200928; the Natural Science Foundation of Jiangsu Province under Grant No. BK2009114; the Huo Ying Dong Education Foundation of China under Grant No. 121009; the Key Project of Chinese Ministry of Education under Grant No. 210081; the Universities Natural Science Research Project of Jiangsu Province Grants No. 10KJB140011 and No. 11KJB140007; a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions; and the Innovation Plan for Graduate Students in the Universities of Jiangsu Province under Grant No. CXLX11_0064.

语种：英文

外文关键词：Polarization

外文摘要：We report experimental generation of an azimuthally polarized (AP) beam with variable spatial coherence. The effect of spatial coherence on the propagation properties of an AP beam is studied both numerically and experimentally, and our experimental results agree well with the theoretical predictions. The dependence of the intensity distribution of an AP beam focused by a high numerical aperture objective lens on its initial spatial coherence is illustrated numerically, and it is found that we can shape the beam profile of a tightly focused AP beam by varying its initial spatial coherence. Furthermore, the radiation forces on Rayleigh particles induced by a tightly focused AP beam are studied, and we find that the tightly focused AP beam can be used to trap a Rayleigh particle whose refractive index is larger or smaller than that of the ambient by varying its initial spatial coherence. Our results will be useful for particle trapping and material thermal processing.