Generation of Traveling Surface Plasmon Waves by Free-Electron Impact

Details Generation of Traveling Surface Plasmon Waves by Free-Electron Impact Generation of Traveling Surface Plasmon Waves by Free-Electron Impact

2006-04-28

arxiv.org/abs/physics/0604227v1

Physics

Optics

Scientific paper

The injection of a beam of free 50 keV electrons into an unstructured gold surface creates a highly localized source of traveling surface plasmons with spectrum centered around 1.8 eV. The plasmons were detected by a controlled decoupling into light with a grating at a distance from the excitation point. The dominant contribution to the plasmon generation appears to come from the recombination of d-band holes created by the electron beam excitation.

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