ABSTRACT
Unlike surface or bulk plasmons, oscillations of conduction electrons
in metal nanoparticles are called localized plasmons or, simply,
plasmons. In a nanoparticle of a specified form, plasmon oscillations
have only a discreet set of frequencies, which are called plasma
resonance frequencies or, simply, plasmon frequencies. This set of
frequencies has a deep analogywith a discrete spectrum of radiation
of atoms and molecules.
