2013/12/27 by N. Asger Mortensen, Søren Raza, Martijn Wubs +2 · 4 citations
Engineering · Materials Science · Physics and Astronomy · #Computer science #Gold and Silver Nanoparticles Synthesis and Applications #Materials science #Nanostructure #Nanotechnology #Nonlinear Optical Materials Studies #Optoelectronics #Physics #Plasmon #Plasmonic and Surface Plasmon Research #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.1038/ncomms4809
published as Nature Communications 5, 3809 (2014) · 7 pages, including 3 figures. Supplementary information is available upon request to authors
arxiv created 2013/12/27 · openalex publication_date 2014/05/02 · arxiv updated 2014/05/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Metallic nanostructures exhibit a multitude of optical resonances associated with localized surface plasmon excitations. Recent observations of plasmonic phenomena at the sub-nanometer to atomic scale have stimulated the development of various sophisticated theoretical approaches for their description. Here instead we present a comparatively simple semiclassical generalized nonlocal optical response (GNOR) theory that unifies quantum-pressure convection effects and induced-charge diffusion kinetics, with a concomitant complex-valued GNOR parameter. Our theory explains surprisingly well both the frequency shifts and size-dependent damping in individual metallic nanoparticles (MNPs) as well as the observed broadening of the cross-over regime from bonding-dipole plasmons to charge-transfer plasmons in MNP dimers, thus unraveling a classical broadening mechanism that even dominates the widely anticipated short-circuiting by quantum tunneling. We anticipate that the GNOR theory can be successfully applied in plasmonics to a wide class of conducting media, including doped semiconductors and low-dimensional materials such as graphene.