arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.13995physics.opticsphysics.app-ph
收藏

线偏振高斯光束对金属微粒的离轴光阱和横向自旋

Off-axis optical trapping and transverse spinning of metallic microparticles with a linearly polarized Gaussian beam

Yansheng Liang, Zhaojun Wang, Ming Lei

摘要:

由于金属微粒对光的强烈散射和吸收,金属微粒的光学捕获仍然是一个很大的挑战。本文报道了一种利用线偏振高斯光斑实现金属微粒稳定捕获的新机制。我们从理论上和实验上证明了金属微粒被这样的陷阱限制在光轴之外。同时,由于陷阱作用于粒子的非对称力场,粒子发生横向自旋运动。金属微粒的离轴捕获和横向自旋为金属微粒的操控提供了新的途径。本文的工作对于更好地理解光与金属粒子之间的相互作用也具有重要意义。

英文摘要:

Optical trapping of metallic microparticles remains a big challenge because of the strong scattering and absorption of light by the particles. In the paper, we report a new mechanism for stable trapping of metallic microparticles by using a tightly focused linearly polarized Gaussian spot. We theoretically and experimentally demonstrated that metallic microparticles were confined off the optical axis by such a trap. In the meanwhile, transverse spinning motion occurred as a consequence of the asymmetric force field acting on the particle by the trap. The off-axis trapping and transverse spinning of metallic microparticles provide new manners for the manipulation of metallic microparticles. The works reported in this paper are also of significance for a better understanding of the mechanical interaction between light and metallic particles.

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。

↑