Skyrmion Generation through the Chirality Interplay of Light and Magnetism

Abstract

Light beams, with their rich degrees of freedom, including polarization and phase, along with their flexible tunability, have emerged as an ideal tool for generating magnetic topological textures.However, how to precisely control the light beams to generate a specific number of magnetic topological textures on demand remains a critical scientific issue that needs to be resolved. Based on the numerical simulation of the Landau-Lifshitz-Gilbert equation, we propose that circularly polarized Laguerre-Gaussian beams can induce chiral magnetic fields through the interaction of the chirality of these beams'angular momenta. By utilizing these chiral magnetic fields, skyrmions or skyrmionium can be induced in chiral magnets. Moreover, the vectorial magnetic fields can be manipulated by adjusting the angular momenta and light intensity, thereby generating target chiral patterns and strengths, which allows for precise control over the type and number of these topological magnetic textures. This finding not only reveals the underlying physical mechanisms of the interaction between light and magnetic systems but also provides a feasible solution for the on-demand generation and encoding of skyrmions.