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Is it possible to enlarge the trapping range of optical tweezers via a single beam?
Li, X.Z.1; Ma, H.X.1; Zhang, H.1; Tang, M.M.1; Li, H.H.1; Tang, J.2; Wang, Y.S.2
Source PublicationApplied Physics Letters
Contribution Rank2

For optical tweezers, a tiny focal spot of the trapping beam is necessary for providing sufficient intensity-gradient force. This condition results in a limited small trapping range to guarantee stable trapping of the particle. Exploiting structured light, i.e., an optical vortex beam, the trapping range can be enlarged by adjusting its doughnut ring diameter. However, the trapped particle scarcely remains static due to the optical spanner action of the orbital angular momentum of the vortex beam. To enlarge the trapping range and simultaneously ensure stable trapping, we propose a beam, referred to as a mirror-symmetric optical vortex beam (MOV). Essentially, MOV is constructed by using two opposite optical spanners and a pair of static optical tweezers. The optical spanners attract the particle to the site of the static optical tweezers, which realizes long-range optical trapping. Through detailed force-field analysis, it is found that MOV could perform these setting functions. In experiments, yeast cells are manipulated in a long range of ∼25 μm, which is 3 times longer than that of the Gaussian beam. Further, the trapping range is easily adjusted by changing a parameter as desired. This technique provides versatile optical tweezers, which will facilitate potential applications for particle manipulation. © 2019 Author(s).

Indexed BySCI ; EI
WOS IDWOS:000460134000008
PublisherAmerican Institute of Physics Inc.
EI Accession Number20191006585488
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLi, X.Z.
Affiliation1.School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, China;
2.State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
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GB/T 7714
Li, X.Z.,Ma, H.X.,Zhang, H.,et al. Is it possible to enlarge the trapping range of optical tweezers via a single beam?[J]. Applied Physics Letters,2019,114(8).
APA Li, X.Z..,Ma, H.X..,Zhang, H..,Tang, M.M..,Li, H.H..,...&Wang, Y.S..(2019).Is it possible to enlarge the trapping range of optical tweezers via a single beam?.Applied Physics Letters,114(8).
MLA Li, X.Z.,et al."Is it possible to enlarge the trapping range of optical tweezers via a single beam?".Applied Physics Letters 114.8(2019).
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