Article ID Journal Published Year Pages File Type
5369564 Applied Surface Science 2007 6 Pages PDF
Abstract

We have investigated ultrashort laser micromachining of metals, both from the point of view of the basic physical processes, and the technological implications. The process of hole drilling of Ni with ≈300 fs SHG (λ = 527 nm) Nd-glass and Al samples with 100 fs Ti:sapphire (λ = 800 nm) laser pulses, respectively, has been experimentally addressed by using time-gated optical emission spectroscopy of the ablated material and SEM analysis of the targets. The ablation process has also been analyzed by classical, molecular dynamics (MD) simulations, by using a Morse potential to describe the interaction between the atoms, and taking into account the electron heat diffusion contribution. The dependence of the ablation depth on laser fluence, as measured by SEM analysis, is in good agreement with the numerical simulations and is also well correlated with the optical emission yield of the expanding plume.

Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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