A practical technique for the generation of highly uniform LIPSS
- Ardron, Marcus
- Weston, Nick
- Hand, Duncan
DOIAbstract
AbstractLaser-induced periodic surface structures (LIPSS) can be reliably produced with ultrashort (<10ps) laser pulses given fluence near the ablation threshold. Neat, parallel, uniform structures are harder to reproduce. Electrodynamic models show a field at normal incidence interacts with the surface resulting in periodicity in intensity along the surface in the direction of the incident E-field producing ridges and toughs on the surface orthogonal to the E-field. A completely smooth surface offers nothing to perturb the eventual periodic feature formation but is very difficult to achieve: we have demonstrated that simply avoiding surface roughness components near the frequency and direction of the emergent features significantly improve...
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