Manipulating and probing the growth of plasmonic nanoparticle arrays using light

Oral Ualibek, Ruggero Verre, Brendan Bulfin, Victor Usov, Karsten Fleischer, John F. McGilp, Igor V. Shvets

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Highly ordered self-assembled silver nanoparticle (NP) arrays have been produced by glancing angle deposition on faceted c-plane Al2O 3 templates. The NP shape can be tuned by changing the substrate temperature during deposition. Reflectance anisotropy spectroscopy has been used to monitor the plasmonic evolution of the sample during the growth. The structures showed a strong dichroic response related to NP anisotropy and dipolar coupling. Furthermore, multipolar resonances due to sharp edge effects between NP and substrate were observed. Analytical and numerical methods have been used to explain the results and extract semi-quantitative information on the morphology of the NPs. The results provide insights on the growth mechanisms by the glancing angle deposition. Finally, it has been shown that the NP morphology can be manipulated by a simple illumination of the surface with an intense light source, inducing changes in the optical response. This opens up new possibilities for engineering plasmonic structure over large active areas.

Original languageEnglish
Pages (from-to)4923-4930
Number of pages8
JournalNanoscale
Volume5
Issue number11
DOIs
Publication statusPublished - Jun 7 2013
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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