Manipulating and probing the growth of plasmonic nanoparticle arrays using light
Artikel i vetenskaplig tidskrift, 2013

Highly ordered self-assembled silver nanoparticle (NP) arrays have been produced by glancing angle deposition on faceted c-plane Al2O3 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.

Författare

O. Ualibek

Trinity College Dublin

Ruggero Verre

Chalmers University of Technology

Trinity College Dublin

B. Bulfin

Trinity College Dublin

V. Usov

Trinity College Dublin

K. Fleischer

Trinity College Dublin

J. F. McGilp

Trinity College Dublin

I. V. Shvets

Trinity College Dublin

Nanoscale

2040-3364 (ISSN)

Vol. 5 11 4923-4930

Ämneskategorier

Nanoteknik

DOI

10.1039/c3nr00087g