Tailoring optical reflections through lattices of high-index dielectric nanoparticles

Due to their low losses and exotic response at optical frequencies, high-index dielectric nanoparticles are a promising candidate for many relevant nanophotonics applications. In this contribution, we investigate the use of arrays of dielectric nanoparticles for tailoring optical reflections. Two different categories of devices are considered: (i) ultra-thin all-reflection coatings and (ii) highly-efficient non-gradient anomalous reflectors. Through both theoretical arguments and full-wave simulations, it is proven that dielectric nanoparticles allow achieving high performances in both the scenarios enabling, thus, new degrees of freedom in the manipulation of optical reflections.