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Circularly-polarized Airy light-sheet spinner tweezers and particle transport
Journal of Quantitative Spectroscopy and Radiative Transfer ( IF 2.3 ) Pub Date : 2020-12-09 , DOI: 10.1016/j.jqsrt.2020.107466
F.G. Mitri

Circularly-polarized Airy light-sheet spinner tweezers are introduced, and their interaction with a subwavelength absorptive dielectric sphere is considered. The mathematical representation of the Cartesian components of the radiated fields is made using the vector angular spectrum method, the Lorenz gauge, and Maxwell's equations for an Airy light-sheet with circular polarization. The results demonstrate the existence of an attractive (pulling) longitudinal force. Furthermore, in contrast with linearly (TM or TE) polarized Airy light-sheets for which the longitudinal spin torque vanishes, the circularly polarized Airy light sheet induces both longitudinal and lateral spin torques causing counter-clockwise or clockwise rotation contingent upon the location of the sphere in the transverse plane. The study is extended to calculate the trajectories of the sphere in the transverse illuminating plane (xy), stemming from a particle dynamics analysis based on Newton's second law of motion. The results are of particular importance in the development of light-sheet spinner tweezers, optical polarization switching for the development and optimization of sorting miniature devices, novel polarization reconfigurable methods and techniques, and related applications in particle manipulation, transport and rotation.



中文翻译:

圆偏振Airy光片微调镊子和粒子传输

介绍了圆偏振的艾里光片旋转镊子,并考虑了它们与亚波长吸收介电球的相互作用。辐射场的笛卡尔分量的数学表示是使用矢量角谱方法,Lorenz量规和麦克斯韦方程针对圆形偏振的艾里光片进行的。结果证明存在吸引力(拉动)纵向力。此外,与线性(TM或TE)偏振的艾里光片的纵向自旋扭矩消失相反,圆偏振的艾里光片引起的纵向和横向自旋扭矩均会导致逆时针或顺时针旋转,具体取决于镜头的位置。横向球体。xy),源于基于牛顿第二运动定律的粒子动力学分析。这些结果对于光片微调镊子的开发,用于分选微型设备的开发和优化的光偏振转换,新颖的偏振可重构方法和技术以及在粒子操纵,运输和旋转中的相关应用特别重要。

更新日期:2020-12-18
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