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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 24 — Dec. 15, 2009
  • pp: 3905–3907

Plasmon-enhanced total-internal-reflection fluorescence by momentum-mismatched surface nanostructures

Kyujung Kim, Youngjin Oh, Kyungjae Ma, Eunji Sim, and Donghyun Kim  »View Author Affiliations

Optics Letters, Vol. 34, Issue 24, pp. 3905-3907 (2009)

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We investigate optimum plasmon-enhanced total-internal-reflection fluorescence imaging by metallic thin films and nanostructures. The enhancement is based on the mismatch between the conditions of plasmon resonance and maximal near-field intensity. We have calculated plasmon-associated near-field and far-field characteristics using rigorous coupled-wave analysis. Near-field intensity was experimentally measured with fluorescent beads on silver thin films, nanogratings, and nanoislands. The results for nanostructure-based plasmon excitation confirm that momentum mismatching when exciting plasmons can increase the consequent emission of fluorescence substantially. The improvement can be critical depending on the specific structure.

© 2009 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.6680) Optics at surfaces : Surface plasmons
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Diffraction and Gratings

Original Manuscript: September 4, 2009
Revised Manuscript: November 11, 2009
Manuscript Accepted: November 19, 2009
Published: December 15, 2009

Kyujung Kim, Youngjin Oh, Kyungjae Ma, Eunji Sim, and Donghyun Kim, "Plasmon-enhanced total-internal-reflection fluorescence by momentum-mismatched surface nanostructures," Opt. Lett. 34, 3905-3907 (2009)

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