2022/04/12 by Yijie Shen, Shen, Yijie, Nikitas Papasimakis +3 · 4 citations
Physics and Astronomy · #Advanced Fiber Laser Technologies #Laser-Matter Interactions and Applications #Orbital Angular Momentum in Optics #physics.class-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.2204.05676
openalex publication_date 2022/04/12 · openalex created_date 2022/04/27 · openalex updated_date 2026/07/31
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.