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Toroidal vortices of light

Wan, Chenhao, Cao, Qian, Chen, Jian, Chong, Andy, Zhan, Qiwen·2022·Nature Photonics
DOI 10.1038/s41566-022-01013-y
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Abstract

Toroidal vortices, also known as vortex rings, are whirling, closed-loop disturbances that form a characteristic ring shape in liquids and gases and propagate in a direction that is perpendicular to the plane of the ring. They are well-studied structures and commonly found in various fluid and gas flow scenarios in nature, for example in the human heart, underwater air bubbles and volcanic eruptions 1–3 . Here we report the experimental observation of a photonic toroidal vortex as a new solution to Maxwell’s equations, generated by the use of conformal mapping 4–7 . The resulting light field has a helical phase that twists around a closed loop, leading to an azimuthal local orbital angular momentum density. The preparation of such an intriguing state of light may offer insights for exploring the behaviour of toroidal vortices in other disciplines and find important applications in light–matter interactions, optical manipulation, photonic symmetry and topology, and quantum information 8–17 .

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Research works printed but not linked: 29

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Metadata

Authors
Wan, C., Cao, Q., Chen, J., Chong, A., & Zhan, Q.
Venue
Nature Photonics
Publisher
Springer Science and Business Media LLC
Published
2022-06-02
Volume
16
Issue
7
Pages
519-522
ISSN
  • 1749-4885
  • 1749-4893
DOI
10.1038/s41566-022-01013-y
Cited by
210
References
0
Language
en
Licence
Funders
  • Wuhan Municipal Science and Technology Bureau (2020010601012169)
  • National Natural Science Foundation of China (92050202)
  • Shanghai Science and Technology Development Foundation (19060502500)

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