Femtosecond field ion emission by surface optical rectification.
We show that a model based on the surface optical rectification effect associated with the nonlinear response of free electrons may explain quantitatively, without adjustable parameters, all the observed features of the ultrafast laser-assisted field-ion emission from metal tips. Moreover, the same model provides also a plausible explanation for the low-fluence ultrafast laser ablation recently observed in metal surfaces and nanoparticles. We further test our model with experiments of ultrafast laser-assisted field-ion emission from tungsten tips in the tomographic atom probe.
Groupe de Physique des Materiaux, UMR CNRS 6634-UFR Sciences, Site du Madrillet, Avenue de l'Université-B.P. 12, 76801 Saint Etienne Du Rouvray Cedex, France. angela.vella@univ-rouen.fr
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Vella
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Deconihout
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Marrucci
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Santamato