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Assembly of optically resonating colloids for the fabrication of metamaterials

Virgine Ponsinet Centre de Recherche Paul Pascal CNRS-Université de Bordeaux

I will present our recent results on the assembly of plasmonic nanoparticles into dense uniform 3D structures, in which tailored localized surface plasmon resonances of the nanoparticles provide specific optical responses. Such self-assembled metamaterials provide a promising platform towards bulk optical materials with unusual effective properties. In particular, we produce lamellar metal-dielectric nanocomposites, which constitute self-assembled hyperbolic metamaterials, and colloidal nanoresonators ("plasmonic raspberries") presenting optical magnetism at visible wavelengths, which can be assembled into a bulk magnetic metamaterial.