Direct observation of plasmonic modes in au nanowires using high-resolution cathodoluminescence spectroscopy

Nano Lett. 2007 Sep;7(9):2843-6. doi: 10.1021/nl071480w. Epub 2007 Aug 24.


We use cathodoluminescence imaging spectroscopy to excite and investigate plasmonic eigenmodes of Au nanowires with lengths of 500-1200 nm and approximately 100 nm width. We observe emission patterns along the Au nanowire axis that are symmetric and strongly wavelength dependent. Different patterns correspond to different resonant modes of the nanowire. From the observed patterns, we derive the spatial and spectral properties of the wire eigenmodes and determine the dispersion relation for plasmonic Au nanowire modes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electrodes
  • Gold / chemistry*
  • Luminescent Measurements / methods*
  • Materials Testing
  • Nanotechnology / methods*
  • Nanotubes / chemistry*
  • Particle Size
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Spectrum Analysis / methods*
  • Surface Plasmon Resonance / methods*


  • Gold