Rate dependence of short-pulse laser ablation of metals in air and vacuum
- Cite this article as:
- Wynne, A. & Stuart, B. Appl Phys A (2003) 76: 373. doi:10.1007/s00339-002-1823-8
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Ablation rates of aluminum and stainless steel are studied as a function of fluence, hole depth, pulse duration and ambient pressure (air vs vacuum). We find a weak rate dependence on pulse duration from 150 fs to 500 ps, and a strong rate dependence on hole depth due to surface roughness. Machining in air plays an important role in deep holes, but has a weaker influence on initial surface ablation rates. Oxidation greatly reduces drilling rates for deep holes in aluminum.