Brownian dynamics of the optically trapped spinning microparticles in low pressures | |
Lang, Mengjiao1; Xiong, Wei1; Xiao, Guangzong1,2; Han, Xiang1; Tang, Jianxun1; Xiao, Guangzong (xiaoguangzong@nudt.edu.cn) | |
2017 | |
会议日期 | 2017-06-04 |
会议地点 | Beijing, China |
卷号 | 10460 |
DOI | 10.1117/12.2284450 |
英文摘要 | Optical trap has become a powerful tool of biology and physics, since it has some useful functions such as optical rotator, optical spanner and optical binding. We present the translational motions in the transverse plane of a 4.4μm-diameter vaterite particle which is optically trapped in low pressures utilizing the Monte-Carlo method. We find that the air pressure around the microparticle plays an important part in the determination of dynamics of the trapped particle. According to the energy equipartition theorem, the position fluctuations of the optically trapped particle satisfy Maxwell-Bolzmann distributions. We present the features of particles' displacements and velocities changing with air pressures in detail, and find that the modulation of the trap stiffness makes a higher position variance. The mechanical quality factor Q larger than 10 induces a high peak of power spectral density. Our research presents a powerful tool towards further discovery of dynamical characteristics of optically trapped Brownian particles in low air pressures. © 2017 SPIE. |
产权排序 | 2 |
会议录 | AOPC 2017: Optoelectronics and Micro/Nano-Optics |
会议录出版者 | SPIE |
语种 | 英语 |
ISSN号 | 0277786X |
ISBN号 | 9781510614017 |
内容类型 | 会议论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/29866] |
专题 | 西安光学精密机械研究所_瞬态光学技术国家重点实验室 |
通讯作者 | Xiao, Guangzong (xiaoguangzong@nudt.edu.cn) |
作者单位 | 1.College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha; 410073, China 2.State Key Laboratory of Transient Optics and Photonic, Chinese Academy of Sciences, Xian; 710068, China |
推荐引用方式 GB/T 7714 | Lang, Mengjiao,Xiong, Wei,Xiao, Guangzong,et al. Brownian dynamics of the optically trapped spinning microparticles in low pressures[C]. 见:. Beijing, China. 2017-06-04. |
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