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Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.

ABSTRACT: The strongly enhanced and localized optical fields that occur within the gaps between metallic nanostructures can be leveraged for a wide range of functionality in nanophotonic and optical metamaterial applications. Here, we introduce a means of precise control over these nanoscale gaps through the application of a molecular spacer layer that is self-assembled onto a gold film, upon which gold nanoparticles (NPs) are deposited electrostatically. Simulations using a three-dimensional finite element model and measurements from single NPs confirm that the gaps formed by this process, between the NP and the gold film, are highly reproducible transducers of surface-enhanced resonant Raman scattering. With a spacer layer of roughly 1.6 nm, all NPs exhibit a strong Raman signal that decays rapidly as the spacer layer is increased.

SUBMITTER: Hill RT

PROVIDER: S-EPMC2955164 | biostudies-literature | 2010 Oct

REPOSITORIES: biostudies-literature

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Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.

Hill Ryan T RT Mock Jack J JJ Urzhumov Yaroslav Y Sebba David S DS Oldenburg Steven J SJ Chen Shiuan-Yeh SY Lazarides Anne A AA Chilkoti Ashutosh A Smith David R DR

Nano letters 20101001 10

The strongly enhanced and localized optical fields that occur within the gaps between metallic nanostructures can be leveraged for a wide range of functionality in nanophotonic and optical metamaterial applications. Here, we introduce a means of precise control over these nanoscale gaps through the application of a molecular spacer layer that is self-assembled onto a gold film, upon which gold nanoparticles (NPs) are deposited electrostatically. Simulations using a three-dimensional finite eleme ...[more]

PMID: 20804206

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