Fig. 6: Numerical simulation of spatiotemporal skyrmion propagation in anomalous dispersive media.

a1–a3 The 3D iso-intensity (10% max) profiles of the RCP and LCP component of Spatiotemporal skyrmion at different propagation distances (–zR, 0, and zR). b1–b3 and c1–c3) The corresponding amplitude and phase distributions of RCP and LCP component. d Evolution of skyrmion helicity along the propagation dimension z