Plasmon spectra of nanospheres under a tightly focused beam

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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.
19 pages, 7 figures

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Optics, Chemical Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/157826

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0711.3649
 http://arxiv.org/abs/0711.3649
 J. Opt. Soc. Am. B 25, 651 (2008)
 doi:10.1364/JOSAB.25.000651

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arXiv