Subdiffraction limited, remote excitation of surface enhanced raman scattering

James A. Hutchison, Silvia P. Centeno, Hideho Odaka, Hiroshi Fukumura, Johan Hofkens, Hiroshi Uji-i

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

We demonstrate that focused laser excitation at the end of silver nanowires of 50-150 nm diameter excites SERS hot-spots at points of nanoparticle adsorption many micrometers along the wire due to the plasmon waveguide effect. The total SERS intensity detected at the hot-spots following wire-end excitation correlates with the known wavelength, polarization, and distance dependences of surface plasmon polariton (SPP) propagation in nanowires. The SERS spectra obtained at the hot-spots following wire-end excitation show very little background compared to when excitation occurs directly at the hot-spot, suggesting that a much smaller SERS excitation volume is achieved by remote, waveguide excitation. The ability to transfer SERS excitation over several micrometers, through a structure with a subdiffraction limit diameter, is discussed with respect to potential high-resolution SERS imaging applications.

Original languageEnglish
Pages (from-to)995-1001
Number of pages7
JournalNano Letters
Volume9
Issue number3
DOIs
Publication statusPublished - 2009 Mar 11

ASJC Scopus subject areas

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

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  • Cite this

    Hutchison, J. A., Centeno, S. P., Odaka, H., Fukumura, H., Hofkens, J., & Uji-i, H. (2009). Subdiffraction limited, remote excitation of surface enhanced raman scattering. Nano Letters, 9(3), 995-1001. https://doi.org/10.1021/nl8030696