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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 15 — Jul. 16, 2012
  • pp: 16785–16793

Competition between excitation and emission enhancements of quantum dots on disordered plasmonic nanostructures

Seung Ho Choi, Bongseop Kwak, Bumsoo Han, and Young L. Kim  »View Author Affiliations

Optics Express, Vol. 20, Issue 15, pp. 16785-16793 (2012)

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Plasmon-enhanced fluorescence is attributable to two independent processes: 1) excitation enhancement due to an increased electric field near metallic nanostructures and 2) emission enhancement from a surface plasmon resonance-coupled excited state of fluorophores. Using semiconductor nanocrystals (quantum dots) on disordered plasmonic nanostructures and a mesoscopic imaging approach, we demonstrate that increased excitation can diminish the fluorescence emission enhancement efficiency. Thus, our experimental evidence on this competitive behavior has critical implications for better developing plasmon-enhanced photoluminescence.

© 2012 OSA

OCIS Codes
(100.2980) Image processing : Image enhancement
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(220.4241) Optical design and fabrication : Nanostructure fabrication
(250.5403) Optoelectronics : Plasmonics

ToC Category:

Original Manuscript: May 17, 2012
Revised Manuscript: June 29, 2012
Manuscript Accepted: July 2, 2012
Published: July 10, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

Seung Ho Choi, Bongseop Kwak, Bumsoo Han, and Young L. Kim, "Competition between excitation and emission enhancements of quantum dots on disordered plasmonic nanostructures," Opt. Express 20, 16785-16793 (2012)

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