首页    期刊浏览 2024年11月08日 星期五
登录注册

文章基本信息

  • 标题:Spin to orbital light momentum conversion visualized by particle trajectory
  • 本地全文:下载
  • 作者:Alejandro V. Arzola ; Lukáš Chvátal ; Petr Jákl
  • 期刊名称:Scientific Reports
  • 电子版ISSN:2045-2322
  • 出版年度:2019
  • 卷号:9
  • 期号:1
  • 页码:1-7
  • DOI:10.1038/s41598-019-40475-z
  • 出版社:Springer Nature
  • 摘要:In a tightly focused beam of light having both spin and orbital angular momentum, the beam exhibits the spin-orbit interaction phenomenon. We demonstrate here that this interaction gives rise to series of subtle, but observable, effects on the dynamics of a dielectric microsphere trapped in such a beam. In our setup, we control the strength of spin-orbit interaction with the width, polarization and vorticity of the beam and record how these parameters influence radius and orbiting frequency of the same single orbiting particle pushed by the laser beam. Using Richard and Wolf model of the non-paraxial beam focusing, we found a very good agreement between the experimental results and the theoretical model based on calculation of the optical forces using the generalized Lorenz-Mie theory extended to a non-paraxial vortex beam. Especially the radius of the particle orbit seems to be a promising parameter characterizing the spin to orbital momentum conversion independently on the trapping beam power.
国家哲学社会科学文献中心版权所有