META 2021, META'12

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Self-assembly of metallic nanoparticles into plasmonic rings
Thomas Lerond, Thomas Lerond, Julien Proust, Davy Gerard, Jérôme Plain

Last modified: 2012-02-25


- Metallic nanoparticles are self-assembled into plasmonic nanorings by evaporation and driven using a template of dielectric microspheres. Well-ordered arrays of metallic nanorings over large areas are obtained. The inner and outer diameters of the rings, as well as the pitch of the array, are controllable. The optical resonances supported by the plasmonic rings are then characterized using extinction spectroscopy. This approach opens a simple and inexpensive road to create plasmonic structures that can find applications as metamaterials or substrates for enhanced spectroscopies.