Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light

Ryan T. Hill, Jack J. Mock, Yaroslav Urzhumov, David S. Sebba, Steven J. Oldenburg, Shiuan Yeh Chen, Anne A. Lazarides, Ashutosh Chilkoti, David R. Smith

Research output: Contribution to journalArticle

132 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)4150-4154
Number of pages5
JournalNano letters
Volume10
Issue number10
DOIs
Publication statusPublished - 2010 Oct 13

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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