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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 21 — Oct. 17, 2007
  • pp: 14266–14274

Spectral dependence of single molecule fluorescence enhancement

Palash Bharadwaj and Lukas Novotny  »View Author Affiliations


Optics Express, Vol. 15, Issue 21, pp. 14266-14274 (2007)
http://dx.doi.org/10.1364/OE.15.014266


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Abstract

The fluorescence from a single molecule can be strongly enhanced near a metal nanoparticle acting as an optical antenna. We demonstrate the spectral tunability of this antenna effect and show that maximum enhancement is achieved when the emission frequency is red-shifted from the surface plasmon resonance of the particle. Our experimental results, using individual gold and silver particles excited at different laser-frequencies, are in good agreement with an analytical theory which predicts a different spectral dependence of the radiative and non-radiative decay rates.

© 2007 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.2160) Physical optics : Energy transfer
(260.2510) Physical optics : Fluorescence
(160.4236) Materials : Nanomaterials

ToC Category:
Physical Optics

History
Original Manuscript: September 5, 2007
Revised Manuscript: October 9, 2007
Manuscript Accepted: October 9, 2007
Published: October 12, 2007

Virtual Issues
Vol. 2, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Palash Bharadwaj and Lukas Novotny, "Spectral dependence of single molecule fluorescence enhancement," Opt. Express 15, 14266-14274 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-21-14266


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