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Nondiffracting Supertoroidal Pulses: Optical "K\'arm\'an vortex streets" by Shen, Yijie; Papasimakis, Nikitas; Zheludev, Nikolay I. is a scholarly article available to read on EtoBox.

What is Nondiffracting Supertoroidal Pulses: Optical "K\'arm\'an vortex streets" about?

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 K\'arm\'an 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.

Author

Shen, Yijie; Papasimakis, Nikitas; Zheludev, Nikolay I.

Published

2022

Language

EN