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arXiv · 2002.06860

Precise position- and angular-controllable optical trapping and manipulation via a single vortex-pair beam

Jisen Wen·Binjie Gao·Dadong Liu·Guiyuan Zhu·Li-Gang Wang
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Abstract

Optical trapping and manipulation using laser beams play a key role in many areas including biology, atomic science, and nanofabrication. Here, we propose and experimentally demonstrate the first use of a vortex-pair beam in optical trapping and manipulation. We successfully trap two spherical microparticles simultaneously by a single vortex-pair beam. Precisely position-controllable manipulation of the trapped spherical microparticles is realized by adjusting the off-axis distance of the vortices on the initial phase plane of the vortex-pair beam. Based on the feature of the vortex-pair beam, as an optical wrench, the high-precision angular-controllable rotation of the cylindrical microrod is achieved by rotating the initial phase structure. Our result provides a rich control on the trapping of microparticles and has greatly important applications in biological area, and optically driven micromachines or motors.

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Jisen Wen, Binjie Gao, Dadong Liu, Guiyuan Zhu, Li-Gang Wang. 2020-02-17. Precise position- and angular-controllable optical trapping and manipulation via a single vortex-pair beam. https://arxiv.org/abs/2002.06860

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