ABSTRACT
Metal nanoparticles exhibit, on account of their localized surface
plasmon oscillations, strong tunable absorption and scattering
resonances and surface-enhanced electric fields. These resonances
and near-fields can be enhanced and engineered further by coupling
metal nanoparticles into defined groupings or assemblies. In this
chapter, we discuss a) the conceptual foundation of plasmonic
coupling between metal nanoparticles, b) how this coupling
influences the near-and far-field optical properties of assembled
metal nanostructures, and c) implications for field-enhanced light-
matter interactions, spectroscopy, nanophotonics, and sensing.
