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Applied Physics B

, Volume 114, Issue 3, pp 355–359 | Cite as

Separation of spin angular momentum in space-variant linearly polarized beam

  • Hao Chen
  • Zhongliang Yu
  • Jingjing Hao
  • Zhaozhong Chen
  • Ji Xu
  • Jianping DingEmail author
  • Hui-Tian Wang
Article

Abstract

We show that the spin angular momentum (SAM) flux in a space-variant linearly polarized beam can be separated in the focal plane. Such a beam carries only orbital angular momentum (OAM) and develops a net SAM flux upon focusing. The radial splitting of the SAM flux density is mediated by the phase vortex (or OAM) and can be controlled by the topological charge of the phase vortex. Optical trapping experiments verify the separation of the SAM flux density. The proposed approach enriches the manipulation of the angular momentum of light fields and inspires more designs of focus engineering, which would benefit optical micromanipulation of microscopic particles.

Keywords

Orbital Angular Momentum Topological Charge Polarization Vortex Sodium Dodecyl Sulfate Solution Spin Angular Momentum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was supported in part by the National Natural Science Foundation of China (Grant Nos. 11074116, 10934003, and 11274158), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20090091110012), and the National Basic Research Program (973 Program) of China (Grant No. 2012CB921900).

Supplementary material

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Hao Chen
    • 1
  • Zhongliang Yu
    • 1
  • Jingjing Hao
    • 1
  • Zhaozhong Chen
    • 1
  • Ji Xu
    • 1
  • Jianping Ding
    • 1
    Email author
  • Hui-Tian Wang
    • 1
  1. 1.National Laboratory of Solid State Microstructures and School of PhysicsNanjing UniversityNanjingChina

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