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.
Highlights
The large optical fields provided by surface plasmons have in the past been used to significantly increase the fluorescence and luminescence intensity of dye molecules for applications in biological and biochemical sensing
We have experimentally verified that the emission of visible light
from dye doped polymers can be enhanced with the use of surface plasmon coupling
Summary
The large optical fields provided by surface plasmons have in the past been used to significantly increase the fluorescence and luminescence intensity of dye molecules for applications in biological and biochemical sensing. It has been shown that plasmon resonances provided by thin metal layers and metal gratings can be designed to increase the efficiency of solid state semiconductor light sources the surface. Similar increases in the internal and external quantum efficiencies to those observed in InGaN quantum wells in close proximity to metal surfaces can be obtained from dye-doped organic thin films. Organic light emitting diodes [7, 8] (OLEDs) may evolve as the most inexpensive alternatives to fluorescent light sources for large area solid state lighting It is of both commercial and scientific interest to improve the internal quantum efficiencies of the polymer dyes within such light emitters, as well as to increase the light extraction efficiencies from such organic films. We focus on enhancing the light emission efficiency from organic thin films by using the surface plasmon resonance
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