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 journalArticlepeer-review

120 Citations (Scopus)


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
Issue number3
Publication statusPublished - 2009 Mar 11

ASJC Scopus subject areas

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


Dive into the research topics of 'Subdiffraction limited, remote excitation of surface enhanced raman scattering'. Together they form a unique fingerprint.

Cite this