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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 4 — Apr. 1, 2008
  • pp: 651–658

Plasmon spectra of nanospheres under a tightly focused beam

Nassiredin M. Mojarad, Vahid Sandoghdar, and Mario Agio  »View Author Affiliations


JOSA B, Vol. 25, Issue 4, pp. 651-658 (2008)
http://dx.doi.org/10.1364/JOSAB.25.000651


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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.

© 2008 Optical Society of America

OCIS Codes
(260.1960) Physical optics : Diffraction theory
(260.2110) Physical optics : Electromagnetic optics
(290.4020) Scattering : Mie theory
(290.5850) Scattering : Scattering, particles
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Scattering

History
Original Manuscript: November 2, 2007
Revised Manuscript: January 17, 2008
Manuscript Accepted: February 7, 2008
Published: March 31, 2008

Virtual Issues
Vol. 3, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Nassiredin M. Mojarad, Vahid Sandoghdar, and Mario Agio, "Plasmon spectra of nanospheres under a tightly focused beam," J. Opt. Soc. Am. B 25, 651-658 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-4-651

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