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Micromanipulation of high and low indices microparticles using a microfabricated double axicon

机译:使用微加工双轴锥对高折射率和低折射率微粒的显微操作

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The technique of transferring the momentum of optical potential landscapes to control the kinetics of the microscopic particles has recently gained considerable interest. In this paper, we report the optical micromanipulations of high and low indices particles using an optical trapping system integrated with a micron-sized double axicon. A double axicon is used to generate a self-imaged bottle beam, a propagation invariant beam. The transverse intensity profile of the self-imaged bottle beam oscillates along the propagation axis embedding three-dimensional intensity-null points, which are unique to conventional beams used in tweezers-like Gaussian, Laguerre-Gaussian, and Bessel beams. By imaging different portions of a self-imaged bottle beam, the same tweezers system can easily be modified for trapping applications of high and low indices microparticles. Furthermore, the self-reconstruction property of a self-imaged bottle beam is numerically studied and the minimum self-reconstruction distance of an obstructed self-imaged bottle beam is determined.
机译:最近,转移光学势能的动量以控制微观粒子动力学的技术引起了人们的极大兴趣。在本文中,我们报告了使用集成了微米级双轴棱锥的光学捕获系统对高折射率和低折射率粒子进行光学显微操作。双轴锥棱镜用于生成自成像的瓶形光束,即传播不变光束。自成像瓶光束的横向强度分布沿嵌入三维强度-零点的传播轴振荡,这对于像镊子一样的高斯,拉盖尔-高斯和贝塞尔光束中的常规光束而言是独特的。通过对自成像瓶光束的不同部分进行成像,可以轻松修改相同的镊子系统,以捕获高折射率和低折射率微粒。此外,对自成像瓶形光束的自重构特性进行了数值研究,并确定了被阻塞自成像瓶形光束的最小自重构距离。

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