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Updated: Jun 14, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact
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Published on: February 1, 2017

Non-spreading meronic spin defects around optical vortices.

Nilo Mata Cervera1, Miguel Angel Porras2, Yijie Shen3

  • 1Nanyang Technological University, Nanyang Technological University, Singapore, 637378, Singapore.

Reports on Progress in Physics. Physical Society (Great Britain)
|June 12, 2026
PubMed
Summary

Optical vortices feature unique spin fields with topological textures and defects. These structures show enhanced robustness and subwavelength confinement, offering new possibilities for tailored polarization textures.

Keywords:
Angular momentum of lightOptical vorticesStructured lightTopology

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Area of Science:

  • Optics and Photonics
  • Topological Physics

Background:

  • Optical vortices are lines of vanishing intensity and undefined phase in light fields.
  • These vortices exhibit unique polarization properties, including longitudinal polarization and topological spin textures.
  • Existing polarization textures lack robustness against perturbations.

Purpose of the Study:

  • To describe the topologies of transverse spin associated with paraxial vortex beams.
  • To highlight the diversity of topological structures in different spaces (spin unit sphere, Poincaré sphere).
  • To discuss the mechanisms behind the subwavelength localization of these spin textures.

Main Methods:

  • Analysis of the spin field structure around optical vortex phase singularities.
  • Investigation of topological features including point defects and meronic textures.
  • Examination of propagation dynamics and subwavelength confinement properties.

Main Results:

  • Identified unique spin field structures with topological texture and defect characteristics.
  • Demonstrated deep-subwavelength confinement of the normalized spin field around the vortex line.
  • Showcased enhanced robustness of these textures against isotropic perturbations like atmospheric turbulence.

Conclusions:

  • The described transverse spin topologies are intrinsic features of paraxial vortex beams.
  • Subwavelength localization and topological nature contribute to their robustness.
  • These findings offer insights into novel tailored polarization textures with enhanced stability.