论文标题
非弗拉克式超类脉冲：光学“kármán涡流街”
Nondiffracting Supertoroidal Pulses: Optical "Kármán vortex streets"
论文作者
论文摘要
最近引入了super骨脉冲[Nat。社区。 15，5891（2021）]是一个时空不可分割的自由空间电磁激励家族，具有独特的拓扑特性，包括天空电场配置，奇异性的分形图案以及能量回流的扩展区域。在这里，我们报告了非屈光超类脉冲（ND-STP），传播 - 稳定的Skyrmionic和Vortex环场，这些场在任意传播距离上忍受了单数构型。有趣的是，ND-STPS的现场结构与VonKármán涡流街有很强的相似性，VonKármán涡流街是一种在流体和气体动力学中观察到的旋转涡流的模式，该模式是导致风中悬挂电话线的“唱歌”。我们认为，ND-STP是电信应用程序的指示能源通道感兴趣的。
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.
