【AIGC One Sentence Reading】:本研究探讨了一阶涡旋角向偏振圆对称艾里光束对瑞利颗粒的光力特性,发现该光束能高效束缚玻璃微粒,对气泡束缚力较弱,且相比高斯光束,对光强要求更低。
【AIGC Short Abstract】:本研究详细探讨了一阶涡旋角向偏振圆对称艾里光束对瑞利颗粒的光力作用,发现该光束能改变焦平面自旋角动量分布,影响焦斑特性。通过计算分析,揭示了光束参数对自聚焦的影响,并评估了玻璃微粒和气泡在焦点区域的受力情况,展示了矢量圆对称光束在微粒操作中的优势。
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Abstract
In this paper, the optical force characteristics of the azimuthally polarized circular Airy beams with a first order vortex on Rayleigh particles are studied in detail. The introduction of orbital angular momentum leads to the localization of the spin angular momentum in the focal plane of the azimuthally polarized beam. The polarization singularity disappears and the original dark focal spot becomes a bright focal spot. In this paper, the influence of different beam parameters on the auto-focusing characteristics of the circular airy beams was calculated and analyzed by using the vector Rayleigh-Sommerfeld diffraction integral. Then, the scattering force and gradient force distribution of glass particles and bubbles in the focal area were calculated, and the trap stiffness at different force equilibrium positions was analyzed. The results show that the vector circularly Airy beams can efficiently confine glass particles in both longitudinal and transverse directions, with much lower intensity requirements than Gaussian beams under the same conditions. For bubbles, the vector circularly Airy beams can only maintain the confinement in the longitudinal direction, and the intensity requirement is much larger than that of the glass particles, while the Gaussian beam with the same condition cannot confine the bubbles.