Polaritonic Metasurfaces

In this talk, I will discuss our recent progress in the area of polaritonics and its role in advancing the field of metamaterials and metasurfaces. Tailored material resonances, based on excitons, phonons, or electronic transitions, can be strongly coupled to light in natural or engineered metasurfaces, unveiling new degrees of freedom for the control of light-matter interactions with light-based quasi-particles. I will discuss how, as the degree of lattice symmetries in the involved materials and in optically engineered structures is reduced, new opportunities emerge in manipulating light and matter at the nanoscale, unveiling giant nonlinearities and topological phenomena in real and reciprocal space.