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Distinguishing the number of captured microspheres in dual-beam optical trap by measuring the back light signal
Zhou, Deyuan1; Chen, Xinlin1; Xiao, Guangzong1,2; Han, Xiang1; Jin, Shilong1; Xiao, Guangzong (xiaoguangzong@nudt.edu.cn)
2017
Conference NameApplied Optics and Photonics China: Optoelectronics and Micro/Nano-Optics, AOPC 2017
Source PublicationAOPC 2017: Optoelectronics and Micro/Nano-Optics
Volume10460
Conference Date2017-06-04
Conference PlaceBeijing, China
PublisherSPIE
Contribution Rank2
Abstract

Optical traps have been widely used in a large variety of applications ranging from biophysics to nano-sciences. More than one microscopic object can be captured in an optical trap. In the practical application, it is always necessary to distinguish and control the number of captured objects in the optical trap. In this paper, a novel method has been presented to distinguish the number of trapped microspheres by measuring the intensity of back signal. Clear descent of the back signal has been observed when a microsphere is captured in the center of optical trap. The relative coupling efficiency of back signal decreases as the number of captured microspheres increases both in experiment and theory. This method contributes to miniaturization and integration of applied systems due to getting rid of the imaging system, and is generally applicable to the area of nanoparticle trapping. © 2017 SPIE.

Department瞬态光学技术国家重点实验室
DOI10.1117/12.2284995
Indexed ByEI ; ISTP
ISBN9781510614017
Language英语
ISSN0277786X
Citation statistics
Document Type会议论文
Identifierhttp://ir.opt.ac.cn/handle/181661/29873
Collection瞬态光学技术国家重点实验室
Corresponding AuthorXiao, Guangzong (xiaoguangzong@nudt.edu.cn)
Affiliation1.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
Recommended Citation
GB/T 7714
Zhou, Deyuan,Chen, Xinlin,Xiao, Guangzong,et al. Distinguishing the number of captured microspheres in dual-beam optical trap by measuring the back light signal[C]:SPIE,2017.
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