title: Plasmonic mode engineering with templated self-assembled nanoclusters.
abstract: Plasmonic nanoparticle assemblies are a materials platform in which optical modes, resonant frequencies, and near-field intensities can be specified by the number and position of nanoparticles in a cluster. A current challenge is to achieve clusters with higher yields and new types of shapes. In this Letter, we show that a broad range of plasmonic nanoshell nanoclusters can be assembled onto a lithographically defined elastomeric substrate with relatively high yields using templated assembly. We assemble and measure the optical properties of three cluster types: Fano-resonant heptamers, linear chains, and rings of nanoparticles. The yield of heptamer clusters is measured to be over 30%. The assembly of plasmonic nanoclusters on an elastomer paves the way for new classes of plasmonic nanocircuits and colloidal metamaterials that can be transfer-printed onto various substrate media.
authors.affiliation: Beckman Institute, University of Illinois, 405 North Mathews Avenue, Urbana, Illinois 61801, USA.
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Fan
authors.forename: Kui
authors.initials: K
authors.lastname: Bao
authors.forename: Li
authors.initials: L
authors.lastname: Sun
authors.forename: Jiming
authors.initials: J
authors.lastname: Bao
authors.forename: Vinothan N
authors.initials: VN
authors.lastname: Manoharan
authors.forename: Peter
authors.initials: P
authors.lastname: Nordlander
authors.forename: Federico
authors.initials: F
authors.lastname: Capasso