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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
会议名称Applied Optics and Photonics China: Optoelectronics and Micro/Nano-Optics, AOPC 2017
会议录名称AOPC 2017: Optoelectronics and Micro/Nano-Optics
卷号10460
会议日期2017-06-04
会议地点Beijing, China
出版者SPIE
产权排序2
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.

作者部门瞬态光学技术国家重点实验室
DOI10.1117/12.2284450
收录类别EI ; ISTP
ISBN号9781510614017
语种英语
ISSN号0277786X
引用统计
文献类型会议论文
条目标识符http://ir.opt.ac.cn/handle/181661/29866
专题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]:SPIE,2017.
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