Journal
NANO LETTERS
Volume 10, Issue 9, Pages 3482-3485Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl1016128
Keywords
Plasmon propagation; surface plasmon polariton; gold nanowire; plasmon-exciton coupling; fluorescence enhancement; fluorescence bleaching
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Funding
- Robert A. Welch Foundation [C-1664, C-1703, C-1222, 3M]
- NSF [CHE-0955286, DMR-0547399, CBET-0506832]
- TATRC [W8XWH-07-2-0101]
- Alfred P. Sloan Foundation
- DoE
- NSF
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0955286] Funding Source: National Science Foundation
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Here, we present a novel approach to visualize propagating surface plasmon polaritons through plasmon-exciton interactions between single gold nanowires and a thin film of a fluorescent polymer. A plasmon polariton was launched by exciting one end of a single gold nanowire with a 532 nm laser. The local near-field-of the propagating plasmon modes caused bleaching of the polymer emission. The degree of photobleaching along the nanowire could be correlated with the propagation distance of the surface plasmon polaritons. Using this method of bleach-imaged plasmon propagation,(BlIPP), we determined a plasmon propagation distance of 1.8 +/- 0.4 mu m at 532 nm for chemically grown gold nanowires. Our results are supported by finite difference time domain electromagnetic simulations.
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