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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 9 — Sep. 1, 2007
  • pp: 2259–2267

Computational study of fluorescence scattering by silver nanoparticles

Mustafa H. Chowdhury, Stephen K. Gray, James Pond, Chris D. Geddes, Kadir Aslan, and Joseph R. Lakowicz  »View Author Affiliations

JOSA B, Vol. 24, Issue 9, pp. 2259-2267 (2007)

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We study the nature of fluorescence scattering by a radiating fluorophore placed near a metal nanoparticle with the finite-difference time-domain method. Angle-resolved light-scattering distributions are contrasted with those that result when ordinary plane waves are scattered by the nanoparticle. For certain sized nanoparticles and fluorophore dipoles oriented parallel to the metal surface, we find that the highest scattered fluorescence emission is directed back toward the fluorophore, which is very different from plane-wave scattering. The largest enhancements of far-field radiation are found when the dipole is oriented normal to the surface. We also examined the effect of the fluorophore on the near field around the particle. The fields can be enhanced or quenched compared to the isolated fluorophore and exhibit strong dependence on fluorophore orientation, as well as interesting spatial variations around the nanoparticle.

© 2007 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(290.4020) Scattering : Mie theory
(290.5850) Scattering : Scattering, particles
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:

Original Manuscript: May 28, 2007
Revised Manuscript: June 8, 2007
Manuscript Accepted: June 8, 2007
Published: August 20, 2007

Virtual Issues
Vol. 2, Iss. 10 Virtual Journal for Biomedical Optics

Mustafa H. Chowdhury, Stephen K. Gray, James Pond, Chris D. Geddes, Kadir Aslan, and Joseph R. Lakowicz, "Computational study of fluorescence scattering by silver nanoparticles," J. Opt. Soc. Am. B 24, 2259-2267 (2007)

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