Hybrid Modes and Hybrid Metastructures for Color Reproduction

We explore the possibilities of hybrid metal-dielectric metastructures for color generation. In a first stage, we briefly discuss the main physical phenomena underlying the chromatic response of a hybrid structure. This should settle the basis for the solution of a special kind of inverse problem: To tailor the geometrical parameters of a hybrid diffractive structure to reproduce a specific color. To this end, we outline an inversion scheme recently proposed, based on multi-objective meta-heuristic optimization and Artificial Intelligence techniques, that has been successfully used on the solution of the inverse problem just cited.