Mixing colors of light in nonlinear dielectric nanoantennas and metasurfaces

Abstract

Dielectric nanoantennas and metasurfaces are able to manipulate light wavefronts with the highest efficiency, however, their potential for enhancing nonlinear interactions remains unexplored. Here we show how ultra-small nanocrystals ordered in a metasurface can enable enhanced light-matter interaction for efficient nonlinear wave-mixing. In particular, we show how designer dielectric metasurfaces can enhance second and third harmonic generation resulting in complete nonlinear control of directionality and polarization state of the harmonics.