Light scattering from 2D arrays of monodispersed Ag-nanoparticles separated by tunable nano-gaps: Spectral evolution and analytical analysis of plasmonic coupling
Journal
Optics Express
Journal Volume
16
Journal Issue
20
Pages
15312-15324
Date Issued
2008
Author(s)
Abstract
Two dimensional arrays of monodispersed Ag-nanoparticles separated by different gaps with sub-10 nm precision are fabricated on anodic alumina substrates with self-organized pores. Light scattering spectra from the arrays evolve with the gaps, revealing plasmonic coupling among the nanoparticles, which can be satisfactorily interpreted by analytical formulae derived from generic dipolar approximation. The general formulism lays down a foundation for predicting the Q factor of an array of metallic nano-particles and its geometric characteristics.
Publisher
Optical Society of America (OSA)
Type
journal article