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Optics Letters

Optics Letters


  • Vol. 33, Iss. 9 — May. 1, 2008
  • pp: 899–901

Excitation and emission enhancement of single molecule fluorescence through multiple surface-plasmon resonances on metal trimer nanoantennas

V. Giannini and J. A. Sánchez-Gil  »View Author Affiliations

Optics Letters, Vol. 33, Issue 9, pp. 899-901 (2008)

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We study theoretically the light scattering from trimers of metal nanowires, with emphasis on the occurrence of multiple surface-plasmon resonances, showing that such resonances can be exploited to achieve twofold-enhanced fluorescence from a single molecule placed in the nanotrimer gaps, even if excitation and emission frequencies are separated. Pump enhancement stems from the local field enhancement coinciding with one of the resonances, whereas a strong enhancement of the radiative decay rate (and quantum yield) is revealed at a different resonance, leading to a large overall signal emission.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.2510) Physical optics : Fluorescence
(290.5850) Scattering : Scattering, particles
(160.4236) Materials : Nanomaterials

ToC Category:
Physical Optics

Original Manuscript: December 14, 2007
Revised Manuscript: February 19, 2008
Manuscript Accepted: February 24, 2008
Published: April 21, 2008

Virtual Issues
Vol. 3, Iss. 6 Virtual Journal for Biomedical Optics

V. Giannini and J. A. Sánchez-Gil, "Excitation and emission enhancement of single molecule fluorescence through multiple surface-plasmon resonances on metal trimer nanoantennas," Opt. Lett. 33, 899-901 (2008)

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