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Nano Letters
Volume 6, Number 6, 1113-1115 (May 2006).

Generation of Traveling Surface Plasmon Waves by Free-Electron Impact

M. V. Bashevoy,1 F. Jonsson,1 A. V. Krasavin,1 N. I. Zheludev,1 Y. Chen,2 and M. I. Stockman3

1EPSRC Nanophotonics Portfolio Centre, School of Physics and Astronomy, University of Southampton, SO17 1BJ, United Kingdom
2Rutherford Appleton Laboratory Didcot, Oxon, OX11 0QX, United Kingdom
3Department of Physics and Astronomy, Georgia State University, University Plaza, Atlanta, Georgia 30303-3083

Abstract

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 spectra centered below the surface plasmon resonance frequency. 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.

Full text: PDF [91 kB] | DOI: 10.1021/nl060941v

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Last modified Saturday 19 Feb 2011