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Surface plasmon enhanced emission from dye doped polymer layers

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Abstract

We have experimentally verified that the emission of visible light from dye doped polymers can be enhanced with the use of surface plasmon coupling. By matching the plasmon frequency of a thin unpatterned silver film to the emission of a dye doped polymer deposited onto this metal surface, we have observed a eleven-fold enhancement of light emission. By patterning the silver layer, we estimate that the plasmon frequency can be tuned to match dye doped polymer emission frequencies and even larger emission enhancements as well as extraction efficiencies are expected.

©2005 Optical Society of America

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Figures (4)

Fig. 1.
Fig. 1. Sample structure with both pump light and emission light configurations.
Fig. 2.
Fig. 2. PL spectra of Coumarin 460 on Ag, Au, and on no metal. Coumarin 460 PL spectra on no metal was normalized to 1.
Fig. 3.
Fig. 3. PL Enhancement ratios demonstrating an increase of enhancement with shorter wavelengths using the silver film. Green dotted line is for gold whereas the red solid line is for silver.
Fig. 4.
Fig. 4. Dispersion diagrams of surface plasmons generated on Ag/PMMA red solid line and Au/PMMA green dotted line.

Equations (2)

Equations on this page are rendered with MathJax. Learn more.

k = ω c ε 1 ε 2 ε 1 + ε 2
Z = λ 2 π ε 2 ε 1 ε 1 2
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