Trapping two types of particles using a focused partially coherent modified Bessel-Gaussian beam

Duan, Meiling; Zhang, Hanghang; Li, Jinhong; Cheng, Ke; Wang, Gao; Yang, Wen

doi:10.1016/j.optlaseng.2018.06.015

Cited by 25 publications

(9 citation statements)

References 35 publications

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“…Previous results suggest that a focused pseudo-Schell model beam could be used for trapping dielectric nanoparticles in a similar way to other kinds of partially coherent beams [5,6,[34][35][36][37]. An advantage of the pseudo-Schell model beams is the sharpening of the intensity profile and the high peak that is reached after the source plane (see Figures 5 and 6), which could increase the gradient force exerted on a dielectric particle.…”

Section: Trapping Dielectric Nanoparticle With Pseudo-schell Beamsmentioning

confidence: 90%

Besinc Pseudo-Schell Model Sources with Circular Coherence

et al. 2019

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Partially coherent sources with non-conventional coherence properties present unusual behaviors during propagation, which have potential application in fields like optical trapping and microscopy. Recently, partially coherent sources exhibiting circular coherence have been introduced and experimentally realized. Among them, the so-called pseudo Schell-model sources present coherence properties that depend only on the difference between the radial coordinates of two points. Here, the intensity and coherence properties of the fields radiated from pseudo Schell-model sources with a degree of coherence of the besinc type are analyzed in detail. A sharpening of the intensity profile is found for the propagated beam by appropriately selecting the coherence parameters. As a possible application, the trapping of different types of dielectric nanoparticles with this kind of beam is described.

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Section: Trapping Dielectric Nanoparticle With Pseudo-schell Beamsmentioning

confidence: 90%

Besinc Pseudo-Schell Model Sources with Circular Coherence

et al. 2019

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“…Since the well-established theory of optical coherence, [1] partially coherent beams, such as partially coherent vector beams, [2][3][4][5][6][7] partially coherent circular beams, [8,9] and partially coherent dark diffraction beams [10] have been a topic of great interest in optics. Their features have been studied extensively due to the special advantages in particle trapping [11][12][13] and the anti-interference ability in optical communication in free space. [14,15] On the other hand, vortex beams, [16,17] also named dark hollow beams have been widely investigated due to the potential value of its carrying orbital angular momentum characteristic in particles manipulation.…”

Section: Introductionmentioning

confidence: 99%

Controllable Self‐Focusing Circular Vortex Pearcey Gaussian Beam with Low Spatial Coherence

et al. 2022

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A new type of controllable self‐focusing circular vortex Pearcey Gaussian beam, which can create an optical potential well with adjustable depth and width at the center of the beam by adjusting the coherent width and the number of topological charges, is introduced. As the coherent width increases, the intensity becomes lower in the dark notch caused by the topological charges, which are consistent with the experimental results. In addition, the self‐focusing location and the strength of the circular vortex Pearcey Gaussian beam can be controlled by the spatial coherence in the simulation.

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“…Because the energy at the focal point of the dark hollow beam is low, the Brownian motion of the particles at the focal point can be effectively reduced, improving trapping efficiency. Partially coherent beams, such as modified Bessel–Gaussian and elegant Laguerre–Gaussian beams, can simultaneously capture particles with high and low refractive indices with a suitable mode order, conducted both in theory and experiment 16 , 21 . Circular airy beams show that the focus position of the blocked beams remains the same, enhancing its abrupt autofocusing property 18 .…”

Section: Introductionmentioning

confidence: 99%

“…Since Ashkin et al first demonstrated that a focused Gaussian beam could trap particles [6][7][8] , providing a useful method for trapping micron particles, optical tweezers have made great progress in many fields. Through the unremitting efforts of researchers, various beams were reported and used for trapping and manipulating tiny objects, including Bessel-Gaussian beams [9][10][11] , hollow Gaussian beams [12][13][14] , partially coherent beams 15,16 , and airy beams [17][18][19] . The Bessel beam is well-known for its non-diffractive and self-reconstruction characteristics, and it can axially transport particles and simultaneously capture multilayer particles 9 .…”

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confidence: 99%

Simultaneous and independent capture of multiple Rayleigh dielectric nanospheres with sine-modulated Gaussian beams

Wang

et al. 2021

Sci Rep

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This study investigates the propagation properties and radiation forces on Rayleigh dielectric particles produced by novel sine-modulated Gaussian beams (SMGBs) because of the unique focusing properties of four independent light intensity distribution centers and possessing many deep potential wells in the output plane of the target laser. The described beams can concurrently capture and manipulate multiple Rayleigh dielectric spheres with high refractive indices without disturbing each other at the focus plane. Spheres with a low refractive index can be guided or confined in the focus but cannot be stably trapped in this single beam trap. Simulation results demonstrate that the focused SMGBs can be used to trap particle in different planes by increasing the sine-modulate coefficient g. The conditions for effective and stable capture of high-index particles and the threshold of detectable radius are determined at the end of this study.

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Trapping two types of particles using a focused partially coherent modified Bessel-Gaussian beam

Cited by 25 publications

References 35 publications

Besinc Pseudo-Schell Model Sources with Circular Coherence

Besinc Pseudo-Schell Model Sources with Circular Coherence

Controllable Self‐Focusing Circular Vortex Pearcey Gaussian Beam with Low Spatial Coherence

Simultaneous and independent capture of multiple Rayleigh dielectric nanospheres with sine-modulated Gaussian beams

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