Thursday, January 10, 2013

1301.1962 (Sandor Varro et al.)

Nonlinear photoemission from metal surfaces induced by short laser
pulses: the effect of field enhancement by surface plasmons
   [PDF]

Sandor Varro, Norbert Kroo
Nonlinear electron emission processes induced by surface plasmon oscillations have been studied both experimentally and theoretically. The measured above-threshold electron spectra extend up to energies whose appearance cannot be explained solely by standard non-perturbative methods, which predict photon energy separated discrete energy line spectra with the known fast fall - plateau - cutoff envelope shape, even when taking the large field enhancement into account. The theoretical analysis of our data, based on the concept of plasmon-induced near-field effects, gives reasonably good explanation and qualitative agreement in the whole intensity range.
View original: http://arxiv.org/abs/1301.1962

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