Supertoroidal skyrmions and space-time superoscillation of light

Yijie Shen; Nikitas Papasimakis; Nikolay I. Zheludev

doi:10.1117/12.2623824

24 May 2022 Supertoroidal skyrmions and space-time superoscillation of light

Yijie Shen, Nikitas Papasimakis, Nikolay I. Zheludev

Proceedings Volume 12130, Metamaterials XIII; 121300C (2022) https://doi.org/10.1117/12.2623824
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

Topological complex electromagnetic waves give access to nontrivial light-matter interactions and provide additional degrees of freedom for information transfer. An important example of such electromagnetic excitations are space-time non-separable single-cycle pulses of toroidal topology. Here we introduce an extended family of super-toroidal electromagnetic excitation, which exhibit skyrmionic structure of the electromagnetic fields, multiple singularities, and fractal-like energy backflow. By further introducing bandlimited effect into super-toroidal pulses, we show that spacetime non-separable band-limited light fields can exhibit superoscillations simultaneously in the spatial and temporal domains, i.e. can oscillate faster that the highest harmonics of their spectra. The super-toroidal pulses with space-time superoscillation are of interest for transient light-matter interactions, ultrafast optics, spectroscopy, and toroidal electrodynamics.

Conference Presentation

Citation Download Citation

Yijie Shen, Nikitas Papasimakis, and Nikolay I. Zheludev "Supertoroidal skyrmions and space-time superoscillation of light", Proc. SPIE 12130, Metamaterials XIII, 121300C (24 May 2022); https://doi.org/10.1117/12.2623824

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