Three-dimensional optical manipulation of trapped light-absorbing particles based on a hollow beam

被引：4

作者：

Zhang, Wending ^{[1
]}

Cheng, Xuemei ^{[1
,2
]}

Wang, Xing ^{[2
]}

Niu, Chen ^{[1
]}

Chen, Haowei ^{[1
]}

Bai, Jintao ^{[1
]}

机构：

[1] Northwest Univ, Inst Photon & Photon Technol, State Key Lab Photon Technol Western China Energy, Int Collaborat Ctr Photoelect Technol & Nano Func, Xian 710069, Peoples R China

[2] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China

来源：

EPL | 2022年 / 138卷 / 05期

基金：

中国国家自然科学基金;

关键词：

AEROSOLS; NANOPARTICLES; LEVITATION; MOTION;

D O I：

10.1209/0295-5075/ac2cfb

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a method for optical trapping and three-dimensional manipulation of light-absorbing particles in air based on a hollow beam. The particles can be stably trapped for hours in the focused hollow beam with either horizontal or vertical trapping configuration. Particle revolution in the lateral plane (x-y plane) is achieved by employing a wedge prism to deviate and rotate the optical traps. And the particle movement along the laser propagating direction (z-direction) is realized by changing the size of the hollow trapping beam. The mechanism of particle trapping and manipulation in air is analyzed based on the characteristics of photophoretic force. As high trapping power is avoided, this method is meaningful for the particles of low damage threshold and provides a useful tool for in situ analysis of the single aerosol particle in a nondestructive and non-contact manner. Copyright c (C) 2022 EPLA

引用

页数：6

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