Numerical Modeling of Polarization Vortex Evolution in Strained Ferroelectrics

Inhalt:
An evolution of ferroelectric vortex-antivortex lattices (FVL) in strained ferroelectric materials has been observed experimentally. The discovery of polar vortex textures revealed a new facet of nanoscale ferroelectric materials with prospects for new interaction pathways with chiral, topological, and photonic materials. As experiments and calculations show, FVL have a frequency response in the sub-THz range and thus, electromagnetic (EM) waves at these frequencies may interact with FVL. Therefore, extensive numerical studies of these structures are needed to exploit e.g. anomalous scattering responses and enhanced THz Kerr-type nonlinearity. In this contribution, we present a numerical model of vortex evolution in such material systems which is prepared to analyze (tailored) EM wave-matter interactions in the future.