Nondiffracting Supertoroidal Pulses: Optical "Kármán vortex streets"
arXiv:2204.05676 · doi:10.1038/s41467-024-48927-5
Abstract
Recently introduced supertoroidal light pulses [Nat. Commun. 15, 5891 (2021)] are a family of space-time nonseparable freespace electromagnetic excitations with unique topological properties including skyrmionic field configurations, fractal-like patterns of singularities, and extended areas of energy backflow. Here we report nondiffracting supertoroidal pulses (ND-STPs), propagation-robust skyrmionic and vortex-ring field that endure the singular configurations over arbitrary propagation distances. Intriguingly, the field structure in of ND-STPs has a strong similarity with a von Kármán vortex street, a pattern of swirling vortices observed in fluid and gas dynamics that is responsible for the "singing" of suspended telephone lines in wind. We argue that ND-STPs are of interest as directed energy channels for telecom applications.
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Cited by in corpus (5)
- Free-Space Propagation and Skyrmion Topology of Toroidal Electromagnetic Pulses
- Photonic torons, topological phase transition and tunable spin monopoles
- Space-Time Hopfion Crystals
- Propagation Dynamics of Photonic Toroidal Vortices Mediated by Orbital Angular Momenta
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