Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.
Journal Article (Journal Article)
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.
- Hill, RT; Mock, JJ; Urzhumov, Y; Sebba, DS; Oldenburg, SJ; Chen, S-Y; Lazarides, AA; Chilkoti, A; Smith, DR
- October 2010
Volume / Issue
- 10 / 10
Start / End Page
- 4150 - 4154
Pubmed Central ID
Electronic International Standard Serial Number (EISSN)
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)