Ac-driven vortex-antivortex dynamics in nanostructured superconductor-ferromagnetic hybrids

► We use a method based on hybrid molecular dynamics-Monte Carlo simulation. ► We propose a model considering creation and annihilation of v-av in S/F bilayers. ► v-av are ratcheted in opposite direction contributing additively to a dc voltage. ► There is a mode locking between the drive frequency and the number of v-av.