Plasmon spectra of nanospheres under a tightly focused beam
Anno: 2008
Autori: Mojarad N.M., Sandoghdar V., Agio M.
Affiliazione autori: ETH, Nanoopt Grp, Phys Chem Lab, CH-8093 Zurich, Switzerland.
Abstract: We study the modification of the far-field cross sections and the near-field enhancement for gold and silver nanospheres illuminated by a tightly focused beam. Using a multipole-expansion approach we obtain an analytical solution to the scattering problem and provide insight on the effects of focusing on the optical response. Large differences with respect to Mie theory are especially found when the nanoparticle supports quadrupole or higher-order resonances.
Giornale/Rivista: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume: 25 (4) Da Pagina: 651 A: 658
Parole chiavi: Surface-wave Scattering; Metallic Nano-particles; Electromagnetic Diffraction; Optical-systems; Gaussian-beam; Light; Nanoparticles; Fields; Spectroscopy; EnergyDOI: 10.1364/JOSAB.25.000651Citazioni: 61dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
