||Caroline Bonafos, Nicolas Chery, Clément Majorel, Meiling Zhang, Nicolas Mallet, Patrick Benzo, Maxime Bayle, Alessandro Pugliara, Kremena Makasheva, Béatrice Pécassou, Enrique Navarro, Christian Girard, Anne-Sophie Royet, Pablo Acosta Alba, Sébastien Kerdilès, Yohann Spiegel, Frank Torregrosa, Guilhem Larrieu, Filadelfo Cristiano, Hervé Rinnert, Fabrice Gourbilleau, Robert Carles, Vincent Paillard
Plasmonics is a growing discipline with promising applications in key areas such as energy and health. It is based on the optical properties of noble metal nanoparticles (NPs) that can focus incident light at the nanometer scale. Recently, a strategy to design and produce hybrid metallic-dielectric substrates for optical spectroscopy and imaging has been proposed. By using low energy ion beam synthesis through micrometric masks, different architectures consisting of 3D patterns of Ag nanoparticles embedded in dielectric layers are conceived to simultaneously exploit the Localised Surface Plasmon Resonance (LSPR) and optical interference phenomena. We will show that these embedded AgNPs are multifunctional objects to be used either as plasmonic enhancers, charge carrier or ion reservoirs. To go beyond, alternative “metal free” plasmonics nanostructures consisting of 2D layers of hyper-doped Si nanostructures will be presented, with expected LSPR in the IR and adjustable frequency as a function of the dopant concentration.