Adjustable Elliptic Annular Optical Vortex Array

Ma, Haixiang; Li, Xinzhong; Zhang, Hao; Tang, Jie; Nie, Zhaogang; Li, H. H.; Tang, Miaomiao; Wang, J. G.; Tai, Yuping; Wang, Y. S.

doi:10.1109/lpt.2018.2817643

Cited by 10 publications

(1 citation statement)

References 34 publications

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“…The other method is via the superposition of two or more special structured beams. For instances, the researchers have produced several connected OVAs via the superposition of the Ince–Gaussian (IG) beams, [ 30–32 ] Hermite–Gaussian beams, [ 33 ] 2D curve optical beams, [ 34 ] three or more plane waves, [ 35 ] Laguerre–Gaussianbeams, [ 36–39 ] Bessel beams, [ 40,41 ] perfect vortex beams, [ 42 ] elliptic perfect vortex beams, [ 43 ] and grafted OV beams. [ 21 ] The connected OVAs are verified to have potential applications in microparticle manipulation, particularly in ultracold atoms trapping.…”

Section: Introductionmentioning

confidence: 99%

Flower‐Shaped Optical Vortex Array

et al. 2021

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Herein, the generation of an optical vortex array dubbed the flower‐shaped optical vortex array (FOVA) is proposed and experimentally demonstrated using a single optical path interference method. FOVA is generated by the superposition of even and odd Ince–Gaussian (IG) beams, which have the same degree m and different order p. The number of optical vortices (OVs) in the FOVA is determined based on the values of order p and degree m of the even and odd IG beams. Furthermore, the positive sign of the OVs in the array can be transformed to negative by adding a specific initial phase difference. The OVs vanish and then recover as the initial phase difference increases from 0 to 2π. Moreover, the gradient force and energy flow distribution of the FOVA are studied. The OVA with flower‐shaped structure generated herein has potential significance in applications, such as microparticle manipulation and optical measurements.

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Section: Introductionmentioning

confidence: 99%

Flower‐Shaped Optical Vortex Array

et al. 2021

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Optical vortex array with deformable hybrid Ferris structures

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Zhang

Tai

et al. 2022

Optics & Laser Technology

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Is it possible to enlarge the trapping range of optical tweezers via a single beam?

Zhang

et al. 2019

Applied Physics Letters

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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.

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Adjustable Elliptic Annular Optical Vortex Array

Cited by 10 publications

References 34 publications

Flower‐Shaped Optical Vortex Array

Flower‐Shaped Optical Vortex Array

Optical vortex array with deformable hybrid Ferris structures

Is it possible to enlarge the trapping range of optical tweezers via a single beam?

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