Long-Distance Indirect Excitation of Nanoplasmonic Resonances
In nanoscopic systems, size, geometry, and arrangement are the crucial determinants of the light-matter interaction and resulting nanoparticles excitation. At optical frequencies, one of the most prominent examples is the excitation of localized surface plasmon polaritons, where the electromagnetic radiation is coupled to the confined charge density oscillations. Here, we show that beyond direct near- and far-field excitation, a long-range, indirect mode of particle excitation is available in nanoplasmonic systems. In particular, in amorphous arrays of plasmonic nanodiscs we find strong collective and coherent influence on each particle from its entire active neighborhood. This dependency of the local field response on excitation conditions at distant areas brings exciting possibilities to engineer enhanced electromagnetic fields through controlled, spatially configured illumination.
Keywords: Amorphous plasmonics ; near-field optics ; plasmonic localization ; near-field coupling ; neighbor interaction ; hot spot ; Enhanced Raman-Scattering ; Plasmon Resonances ; Gold Nanoparticles ; Metal Nanoparticles ; Optical-Properties ; Silver Particles ; Nanostructures ; Pairs ; Size ; Shape
Record created on 2011-12-16, modified on 2016-08-09