Off-axis optical levitation and transverse spinning of metallic microparticles  

作　　者：YANSHENG LIANG SHAOHUI YAN ZHAOJUN WANG BAOLI YAO MING LEI 

机构地区：[1]MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter,Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices,School of Physics,Xi’an Jiaotong University,Xi’an 710049,China [2]State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China

出　　处：《Photonics Research》2021年第11期2144-2151,共8页光子学研究（英文版）

基　　金：Innovation Capability Support Program of Shaanxi(2021TD-57);National Natural Science Foundation of China(NSFC)(61905189,62005208,11974417);China Postdoctoral Science Foundation(2019M663656,2020M673365)。

摘　　要：Optical manipulation of metallic microparticles remains a significant challenge because of the strong scattering forces arising from the high extinction coefficient of the particles.This paper reports a new mechanism for stable confinement of metallic microparticles using a tightly focused linearly polarized Gaussian beam.Theoretical and experimental results demonstrate that metallic microparticles can be captured off the optical axis in such a beam.Meanwhile,the three-dimensionally confined particles are observed spinning transversely as a response to the asymmetric force field.The off-axis levitation and transverse spinning of metallic microparticles may provide a new way for effective manipulation of metallic microparticles.

关 键 词：particles. field. METALLIC 

分 类 号：O439[机械工程—光学工程]