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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 26483–26492

Molecular fluorescence in the vicinity of a charged metallic nanoparticle

H. Y. Chung, P. T. Leung, and D. P. Tsai  »View Author Affiliations

Optics Express, Vol. 21, Issue 22, pp. 26483-26492 (2013)

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The modified fluorescence properties of a molecule in the vicinity of a metallic nanoparticle are further studied accounting for the possible existence of extraneous charges on the particle surface. This is achieved via a generalization of the previous theory of Bohren and Hunt for light scattering from a charged sphere, with the results applied to the calculation of the various decay rates and fluorescence yield of the admolecule. Numerical results show that while charge effects will in general blue-shift all the plasmonic resonances of the metal particle, both the quantum yield and the fluorescence yield can be increased at emission frequencies close to that of the surface plasmon resonance of the particle due to the suppression of the nonradiative decay rate. This provides a possibility of further enhancing the particle-induced molecular fluorescence via the addition of surface charge to the metal particle.

© 2013 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.2510) Physical optics : Fluorescence
(260.3910) Physical optics : Metal optics
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(160.4236) Materials : Nanomaterials

ToC Category:

Original Manuscript: July 31, 2013
Revised Manuscript: September 17, 2013
Manuscript Accepted: October 8, 2013
Published: October 28, 2013

H. Y. Chung, P. T. Leung, and D. P. Tsai, "Molecular fluorescence in the vicinity of a charged metallic nanoparticle," Opt. Express 21, 26483-26492 (2013)

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  22. H. Y. Chung, P. T. Leung, and D. P. Tsai, “Decay rates of a molecule in the vicinity of a spherical surface of an isotropic magnetodielectric material,” Phys. Rev. B86(15), 155413 (2012). [CrossRef]
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