• 1 Department of Physics, Zhejiang Sci-Tech University, Hangzhou, 310018, China
  • 2 National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China
  • 3 Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
  • 4 Centre for Optical and Electromagnetic Research, Zhejiang University; Joint Research Center of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang University (China)
Sci Rep, 2015;5:10628.
PMID: 26024434 DOI: 10.1038/srep10628


A caustic vector vortex optical field is experimentally generated and demonstrated by a caustic-based approach. The desired caustic with arbitrary acceleration trajectories, as well as the structured states of polarization (SoP) and vortex orders located in different positions in the field cross-section, is generated by imposing the corresponding spatial phase function in a vector vortex optical field. Our study reveals that different spin and orbital angular momentum flux distributions (including opposite directions) in different positions in the cross-section of a caustic vector vortex optical field can be dynamically managed during propagation by intentionally choosing the initial polarization and vortex topological charges, as a result of the modulation of the caustic phase. We find that the SoP in the field cross-section rotates during propagation due to the existence of the vortex. The unique structured feature of the caustic vector vortex optical field opens the possibility of multi-manipulation of optical angular momentum fluxes and SoP, leading to more complex manipulation of the optical field scenarios. Thus this approach further expands the functionality of an optical system.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.