CHEN Baihua1, LIU Dongmei1,2, QIU Jian1,2, PENG Li1,2, LUO Kaiqing1,2, HAN Peng1,2
(1. School of Physics and Telecommunication Engineering, Guangdong Provincial Engineering Research Center for Optoelectronic Instrument,South China Normal University, Guangzhou 510006, China;2. SCNU Qingyuan Institute of Science and Technology Innovation, Qingyuan 511517, China)
Abstract: Based on the differential dynamic microscopy technology, the experiment studies the effect of polarization on diffusion coefficient of Brownian particles in a weak focused laser. The results show that the diffusion coefficient of Brownian particles illuminating with the laser is smaller than that only with white light. Compared with the linearly polarized light, the diffusion coefficient is smaller than that under the circularly polarized light at the same input light power. The diffusion coefficient of Brownian motion fluctuates with the increase of input light power in the linearly polarized light, while the diffusion coefficient decreases with the increase of laser power under circularly polarized light.
Keywords: diffusion coefficient; Brownian motion; polarized light; differential dynamic microscopy
中图分类号：O436.3
文献标志码：A
文章编号：1008-5548(2021)03-0068-05
DOI:10.13732/j.issn.1008-5548.2021.03.009
收稿日期： 2020-10-20，修回日期：2021-02-04，在线出版时间：2021-04-20。
基金项目：国家自然科学基金项目，编号：61975058；广东省自然科学基金面上项目，编号：2019A1515011401；广东省科技计划项目，编号：2019B090905005。
第一作者简介：陈柏桦(1992—)，男，硕士研究生，研究方向为光电技术与系统。E-mail: 1453501039@qq.com。
通信作者简介：
韩鹏(1976—)，男，博士，教授，博士生导师，研究方向为光电技术与系统。E-mail: hanp@scnu.edu.cn。
刘冬梅(1981—)，女，博士，副教授，硕士生导师，研究方向为光电技术与系统。E-mail: dmliu@scnu.edu.cn。
