环面
物理
旋涡
涡流
涡流环
角动量
光子学
经典力学
拓扑(电路)
光学
量子力学
机械
等离子体
数学
组合数学
作者
Chenhao Wan,Qian Cao,Jian Chen,Andy Chong,Qiwen Zhan
出处
期刊:Nature Photonics
[Springer Nature]
日期:2022-06-02
卷期号:16 (7): 519-522
被引量:61
标识
DOI:10.1038/s41566-022-01013-y
摘要
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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