The physical mechanisms of the laser-induced periodic surface structures (LIPSS) formation are studied in this paper for single-pulse irradiation regimes. The change in the LIPSS period with wavelength of incident laser radiation is investigated experimentally, using a picosecond laser system, which provides 7-ps pulses in near-IR, visible, and UV spectral ranges. The experimental results are compared with predictions made under the assumption that the surface-scattered waves are involved in the LIPSS formation. Considerable disagreement suggests that hydrodynamic mechanisms can be responsible for the observed pattern periodicity.
@article{arxiv.1702.03655,
title = {Wavelength Dependence of Picosecond Laser-Induced Periodic Surface Structures on Copper},
author = {Stella Maragkaki and Thibault J. -Y. Derrien and Yoann Levy and Nadezhda M. Bulgakova and Andreas Ostendorf and Evgeny L. Gurevich},
journal= {arXiv preprint arXiv:1702.03655},
year = {2017}
}