Journal
APPLIED OPTICS
Volume 47, Issue 28, Pages 5229-5234Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.47.005229
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Funding
- National Science Foundation
- Division of Bioengineering and Environmental Systems [00517785]
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A simple strategy for increasing the collection efficiency of surface plasmon-coupled emission (SPCE) is demonstrated. SPCE is a near-field phenomenon occurring when excited fluorophores are in close proximity to a subwavelength metal film. The energy of the fluorophores induces surface plasmons that radiate the coupled energy at highly specific angles. In an attempt to maximize the collected emission, a conical mirror was placed around the coupling prism. The result was a nearly 500 fold enhancement over the free space signal as detected from a single point from a poly(vinyl alcohol) layer doped with ruthenium. Coupling this large enhancement with LED excitation could lead to the development of inexpensive, handheld fluorescent devices with high sensitivity. (C) 2008 Optical Society of America
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