Bessel-modulated autofocusing beams for optimal trapping implementation

Lu, Fuxi; Wu, Hao; Liang, Yi; Tan, Liu; Tan, Zhifu; Xu, Feng; Hu, Yi; Xiang, Yuanjiang; Hu, Xin; Chen, Zhigang; Xu, Jingjun

doi:10.1103/physreva.104.043524

Cited by 20 publications

(7 citation statements)

References 36 publications

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“…[1][2][3] Initially relying on fundamental Gaussian beams (GBs) for trapping, the evolving landscape of optical tweezers technology has spurred the demand for more precise manipulation and advanced photonic tools. Notably, the incorporation of structured beams, [2][3][4][5][6][7] such as optical vortices carrying orbital angular momentum (OAM), has enriched optical manipulation capabilities. These beams, resembling an "optical wrench", can effectively rotate particles within the optical tweezers system.…”

Section: Introductionmentioning

confidence: 99%

Optical trapping capability of tornado circular Pearcey beams

Liu 刘,

Tang 唐,

Liu 刘

et al. 2024

Chinese Phys. B

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We systemically investigated optical trapping capability of a kind of Tornado waves on Rayleigh particles. Such tornado waves are named Tornado Circular Pearcey beams (TCPBs) and produced by combining two circular Pearcey beams with different radii. Our theoretical exploration delved into various aspects, including the propagation dynamics, energy flux, orbital angular momentum, trapping force, and torque characteristics of TCPBs. Our results reveal that the orbital angular momentum, trapping force, and torque of these beams can be finely tuned through the judicious manipulation of their topological charges (l 1 and l 2). Notably, we observed a precise control mechanism wherein the force diminishes with |l 1+l 2| and |l 1-l 2|, while the torque exhibits enhancement by decreasing solely with |l 1+l 2| or increasing with |l 1-l 2|. These results not only provide quantitative insights into the optical trapping performance of TCPBs but also serve as a valuable reference for the ongoing development of innovative photonic tools.

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Section: Introductionmentioning

confidence: 99%

Optical trapping capability of tornado circular Pearcey beams

Liu 刘,

Tang 唐,

Liu 刘

et al. 2024

Chinese Phys. B

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“…Recently, autofocusing beams [11,12] have gained popularity with optical tweezers and manipulation. [3,5,[13][14][15][16][17][18] Without traditional lenses or nonlinearity, autofocusing beams allow sudden autofocusing, giving rise to enhanced intensity at the focus. Previous works have demonstrated that Gaussian beams are susceptible to severe distortions and continuous "center of mass" hopping under turbulence, while Airy beams experience significantly less distortion and drift.…”

Section: Introductionmentioning

confidence: 99%

Robust autofocusing propagation in turbulence

Liu 刘,

Tan 谭,

Chen 陈

et al. 2024

Chinese Phys. B

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Turbulence in complex environments such as atmosphere and biological media has always been a great challenge to the beam propagation application in optical communication, optical trapping and manipulation. To overcome this challenge, this study comprehensively investigate the robust propagation of traditional Gaussian beam and autofocusing beam in turbulent environments. In order to select stable beams that exhibit high intensity and high field gradient at the focal position in complex environments, Kolmogorov turbulence theory is used to simulate the propagation of beams in atmospheric turbulence based on the multi-phase screen method. We systematically analyzed the intensity fluctuations, the variation of the coherence factor, and the change of the scintillation index (SI) with the propagation distance. The analysis reveals that the intensity fluctuations of autofocusing beams are significantly smaller than that of Gaussian beams, and the coherence of autofocusing beams is better than that of Gaussian beams under turbulence. Moreover, autofocusing beams exhibit less oscillation than Gaussian beams, indicating that autofocusing beams propagate in complex environments with less distortion and intensity fluctuation. Overall, this work clearly demonstrates that autofocusing beams exhibit higher stability in propagation compared with the Gaussian beams, showing great promise for applications such as optical trapping and manipulation in complex environments.

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“… – 3 Bessel beam, as a representative of a non-diffracting beam, can maintain the electric field distribution unchanged and has a self-healing effect during transmission 4 , 5 . This property makes it widely used in various applications such as laser processing, 6 – 8 optical capture, 9 , 10 optical coherence tomography, 11 , 12 fast volume imaging, 13 , 14 laser communication, 15 , 16 and holography 17 , 18 . However, generating Bessel beams with high uniformity and high energy utilization is crucial for many applications, especially in laser processing fields 19 …”

Section: Introductionmentioning

confidence: 99%

High uniformity Bessel beam generated by the axicon with a high-order curved surface

Zhai,

Yu,

et al. 2023

Opt. Eng.

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.Generating high uniformity Bessel beam is an interesting target in laser processing. An axicon with a high-order curved surface is proposed to generate Gaussian–Bessel beams with high uniformity and high energy utilization. The original phase function of the standard axicon is replaced by multiple polynomials, which are optimized by a combined algorithm employing the genetic algorithm and the unconstrained nonlinear minimization algorithm. Simulation and experiment results demonstrate that the combined algorithm not only significantly reduces the time complexity of the algorithm greatly but also achieves high uniform intensity distribution at the focal segment. By compensating and optimizing the fifth-order surface axicon, the energy utilization is 17.734%, and the uniformity can reach 93.86%. The processing experiment results confirmed that the presented method can extend the processing depth and obtain high quality.

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Bessel-modulated autofocusing beams for optimal trapping implementation

Cited by 20 publications

References 36 publications

Optical trapping capability of tornado circular Pearcey beams

Optical trapping capability of tornado circular Pearcey beams

Robust autofocusing propagation in turbulence

High uniformity Bessel beam generated by the axicon with a high-order curved surface

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