Surface density enhancement of gold in silica film under laser irradiation at 355 nm
Langue
en
Article de revue
Ce document a été publié dans
Applied Physics Letters. 2004, vol. 85, p. 591-593
American Institute of Physics
Résumé en anglais
In order to understand the damage mechanisms inside the optics of the high power laser facilities, a model sample has been prepared by introducing gold nanoparticles into a silica film. The mean diameter of the gold clusters ...Lire la suite >
In order to understand the damage mechanisms inside the optics of the high power laser facilities, a model sample has been prepared by introducing gold nanoparticles into a silica film. The mean diameter of the gold clusters is 2.5 nm. Different parts of the sample were irradiated at wavelength 355 nm and fluences up to 1 J/cm2. By looking with x-ray photoelectron spectroscopy at the intensity of the Au 4f peak relative to that of the Si 2p peak, a surface Au density enrichment is observed. We interpret this as indicating that the gold atoms migrate toward the surface upon the laser irradiation.< Réduire
Mots clés en anglais
gold
optical films
silicon compounds
thin films
nanoparticles
metal clusters
laser beam effects
X-ray photoelectron spectra
density
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