Metal-dielectric resonator integrated in an asymmetric slab waveguide for spatiotemporal optical vortex generation

We theoretically and numerically demonstrate an efficient approach for generating a spatiotemporal optical vortex (STOV) in an asymmetric dielectric slab waveguide using a metal-dielectric structure constituted by several metal  strips integrated into the waveguide core layer. The presented rigorous numerical simulation results fully confirm the developed theoretical model.