用单一光学装置实现完全浸没的多个物体的与材料无关的长距离牵引、捕获和旋转
Material Independent Long Distance Pulling, Trapping, and Rotation of Fully Immersed Multiple Objects with a Single Optical Set-up
摘要：
到目前为止，利用牵引光束的光学牵引高度依赖于（i）嵌入背景或粒子本身的性质，（ii）粒子的数量和/或（iii）光束相位的手动斜坡。本文提出了解决这些问题的必要理论。本文展示了一种新的主动牵引光束多个完全浸没的对象，其额外的能力，产生一个受控的旋转和所需的3D捕获。通过使用两个同轴或甚至非同轴的、叠加的具有反螺旋性质和不同频率的无衍射高阶贝塞尔光束，用单个光学装置演示了连续和稳定的长距离悬浮、受控旋转和3D捕获。由于纵波矢量和光束阶数的不同，叠加光束沿光束轴和围绕光束轴具有周期性的强度变化。两个激光束的频率差异使得强度图案以连续的方式沿着和围绕光束轴移动，而无需手动调整相位，这允许完全浸没的多个颗粒的线性运动（向前或向后）或角运动（顺时针或逆时针）。作为一个主要的贡献，增加目标绑定区域的条件也提出了操纵多个不同大小和形状的浸没对象。
英文摘要：
Optical pulling with tractor beams is so far highly dependent on (i) the property of embedding background or the particle itself , (ii) the number of the particles and/or (iii) the manual ramping of beam phase. A necessary theoretical solution of these problems is proposed here. This article demonstrates a novel active tractor beam for multiple fully immersed objects with its additional abilities of yielding a controlled rotation and a desired 3D trapping. Continuous and stable long distance levitation, controlled rotation and 3D trapping are demonstrated with a single optical set-up by using two coaxial, or even non-coaxial, superimposed non-diffracting higher order Bessel beams of reverse helical nature and different frequencies. The superimposed beam has periodic intensity variations both along and around the beam-axis because of the difference in longitudinal wave-vectors and beam orders, respectively. The difference in frequencies of two laser beams makes the intensity pattern move along and around the beam-axis in a continuous way without manual ramping of phase, which allows for either linear motion (forward or backward) or angular movement (clockwise or anticlockwise) of fully immersed multiple particles. As a major contribution, the condition for increasing the target binding regions is also proposed to manipulate multiple immersed objects of different sizes and shapes.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
