Generation of topological spin textures using light-induced radially polarized magnetic field

Laser-driven manipulation of magnetic skyrmions holds great promise for the development of next-generation information memory devices due to the flexibility of optical modulation. In this study, we theoretically present an approach for generating and manipulating stable topological spin textures using a light-induced radially polarized magnetic field, along with the ability to easily control quasiparticles by adjusting the intensity of the input beam. The generated topological spin textures can shrink into a stabilized quasiparticle with a size significantly smaller than the light-induced radially polarized magnetic field in few picoseconds. Through exploiting the relaxation mechanism of the spin texture at the center of the beam, we demonstrate the creation and stabilization of quasiparticles with higher ring numbers. Furthermore, we investigate the motion of these distinct quasiparticles and discover that the nπ quasiparticles (n > 1) exhibit significantly faster velocities than a traditional skyrmion, with the 4π quasiparticle being the fastest. Our method offers a promising avenue for constructing various topological spin textures with multiring profiles in ultrafast and high-density data-storage devices.