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Proceedings Paper

Femtosecond pump-probe spectroscopy of surface bound alkali nanoparticles
Author(s): A. Assion; Bernard Lang; M. Simon; S. Voll; Frank Traeger; Gustav Gerber
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Paper Abstract

Second harmonic generation at the surface of Na and K clusters was studied using femtosecond laser pulses. The observed size dependence of the second harmonic intensity can be explained by resonant enhancement of surface plasmon polariton excitation. At different cluster sizes, the second order interferometric autocorrelation of a 25 fs pulse was recorded using the clusters as nonlinear medium. There is no broadening of the cluster autocorrelation with respect to a non resonant reference autocorrelation within the experimental error of 1 fs. This experimental finding is independent of particle size, resonance of the fundamental (potassium) or the second harmonic (sodium) or surface modification by chemisorption of oxygen.

Paper Details

Date Published: 30 April 1998
PDF: 8 pages
Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998); doi: 10.1117/12.307134
Show Author Affiliations
A. Assion, Univ. Wuerzburg (Germany)
Bernard Lang, Univ. Wuerzburg (France)
M. Simon, Univ. Kassel (Germany)
S. Voll, Univ. Wuerzburg (Germany)
Frank Traeger, Univ. Kassel (Germany)
Gustav Gerber, Univ. Wuerzburg (Germany)


Published in SPIE Proceedings Vol. 3272:
Laser Techniques for Surface Science III
Hai-Lung Dai; Hans-Joachim Freund, Editor(s)

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