4 papers
Scalar axion field of toroidal electromagnetic pulses
Wangke Yu, Nikitas Papasimakis, Nikolay I. Zheludev +1
Axion electrodynamics extends Maxwell's theory by postulating a hypothetical pseudoscalar axion field sourced by a scalar product of electric and magnetic fields. In this work, we…
Magnetic Skyrmion Encoding by Structured Light
Zhang Qifan, Yu Wangke, Nie Zhongquan +2
Structured light fields, featuring unique topological properties and high tunability, have opened new frontiers in light-matter interactions with magnetic systems. However, the ult…
Higher-order spatiotemporal wave packets with Gouy phase dynamics
Wangke Yu, Yijie Shen
Spatiotemporal (ST) wave packets refer to a broad class of optical pulses whose spatial and temporal dependence cannot be treated separately. Such space time non-separability can i…
Electric-Magnetic-Switchable Free-Space Skyrmions in Toroidal Light Pulses via a Nonlinear Metasurface
Li Niu, Xi Feng, Xueqian Zhang +10
Recent advances reveal that light propagation in free space supports many exotic topological textures, such as skyrmions. Their unique space-time topologies make them promising can…