Plasmon spectra of nanospheres under a tightly focused beam
Optics
2008-04-02 v1 Chemical Physics
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 found especially when the nanoparticle supports quadrupole or higher-order resonances.
Keywords
Cite
@article{arxiv.0711.3649,
title = {Plasmon spectra of nanospheres under a tightly focused beam},
author = {Nassiredin M. Mojarad and Vahid Sandoghdar and Mario Agio},
journal= {arXiv preprint arXiv:0711.3649},
year = {2008}
}
Comments
19 pages, 7 figures