角动量
光学
轨道运动
极化(电化学)
方位角
光学镊子
光束
旋涡
光的轨道角动量
轨道角动量复用
圆周运动
物理
光学力
经典力学
总角动量
化学
物理化学
作者
Qiang Wang,Zheng-Cong Xia,Jiahao Zhao,Xuan Zhang,Chenghou Tu,Yongnan Li,Hui‐Tian Wang
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-01-08
卷期号:49 (3): 746-746
被引量:4
摘要
As is well known, a light beam with a helical phase carries an optical orbital angular momentum (OAM), which can cause the orbital motion of trapped microparticles around the beam axis. Usually, the speed of the orbital motion is uniform along the azimuthal direction and depends on the amount of OAM and the light intensity. Here, we present the reverse customized method to tailor the nonuniform local OAM density along the azimuthal direction of the focal field, which has a hybrid polarization distribution and maintains a doughnut-shaped intensity profile. Theoretical analysis and experimental results about the orbital motion of the trapped polystyrene sphere show that the nonuniform local OAM density can be tailored by manipulating the polarization states of the focal field. Our results provide an ingenious way to control the local tangential optical force and the speed of the orbital motion of particles driven by the local OAM density and will promote exciting possibilities for exploring ways to control the mechanical dynamics of microparticles in optical trapping and microfluidics.
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