Plasmonic Mode Engineering with Templated Self-Assembled Nanoclusters
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- 作者：Jonathan A. Fan ; Kui Bao ; Li Sun ; Jiming Bao ; Vinothan N. Manoharan ; Peter Nordlander ; Federico Capasso
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：October 10, 2012
- 年：2012
- 卷：12
- 期：10
- 页码：5318-5324
- 全文大小：398K
- 年卷期：v.12,no.10(October 10, 2012)
- ISSN：1530-6992
文摘
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.