Substrate influence on the plasmonic response of clusters of spherical nanoparticles

Article

关键词: RAMAN-SCATTERING;    ABSORPTION;    PARTICLES;    SPECTROSCOPY;    ENHANCEMENT;    MODES;   

DOI  :  10.1103/PhysRevB.83.075426

来源: SCIE

【 摘 要 】

The plasmonic response of nanoparticles is exploited in many subfields of science and engineering to enhance optical signals associated with probes of nanoscale and subnanoscale entities. We develop a numerical algorithm based on previous theoretical work that addresses the influence of a substrate on the plasmonic response of collections of nanoparticles of spherical shape. Our method is a real-space approach within the quasistatic limit that can be applied to a wide range of structures. We illustrate the role of the substrate through numerical calculations that explore single nanospheres and nanosphere dimers fabricated from either a Drude model metal or from silver on dielectric substrates and from dielectric spheres on silver substrates.

【 授权许可】

Free