Electromagnetic Interactions in Plasmonic Nanoparticle Arrays

Alexandre Bouhelier (1) , Renaud Bachelot (2, 1) , Jin Seo Im (1) , Gary Wiederrecht (1) , Gilles Lerondel (2) , Serguei Kochtcheev (2) , Pascal Royer (2)

1 ANL - Argonne National Laboratory [Lemont]
2 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique

Single two-dimensional planar silver arrays and one-dimensional linear gold chains of nanoparticles were investigated by dark-field surface plasmon spectroscopy and studied as a function of interparticle distance, particle size, and number of particles. In agreement with recent theoretical predictions, a red shift of the surface plasmon resonance occurring in two-dimensional arrays was found for lattice spacings below 200 nm. This red shift is associated with a significant broadening of the resonance and is attributed to the onset of near-field interactions. We found that the relative contributions of the long-range and short-range interactions in two-dimensional arrays of particles are fundamentally different to those occurring in individual linear chains.

Domains: Engineering Sciences [physics]; Micro and nanotechnologies/Microelectronics; Engineering Sciences [physics]; Optics / Photonic

Alexandre Bouhelier, Renaud Bachelot, Jin Seo Im, Gary Wiederrecht, Gilles Lerondel, et al.. Electromagnetic Interactions in Plasmonic Nanoparticle Arrays. Journal of Physical Chemistry B, 2005, 109 (8), pp.3195-3198. ⟨10.1021/jp046224b⟩. ⟨hal-02309933⟩