Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2008-03-11
Physics
Condensed Matter
Other Condensed Matter
SPIE Photonics Europe 2008 proceedings
Scientific paper
10.1117/12.786772
Highly ordered periodic arrays of silver nanoparticles have been fabricated which exhibit surface plasmon resonances in the visible spectrum. We demonstrate the ability of these structures to alter the fluorescence properties of vicinal dye molecules by providing an additional radiative decay channel. Using fluorescence lifetime imaging microscopy, we have created high resolution spatial maps of the molecular lifetime components; these show an order of magnitude increase in decay rate from a localized volume around the nanoparticles, resulting in a commensurate enhancement in the fluorescence emission intensity. Spatial maps of the Raman scattering signal from molecules on the nanoparticles shows an enhancement of more than 5 orders of magnitude.
Cade Nic
Richards David
Ritman-Meer Tom
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