Modification of narrow ablating capillaries under the influence of multiple femtosecond laser pulses

Powerful femtosecond laser pulses that propagate through narrow ablating capillaries cause modification of capillary walls, which is studied experimentally and theoretically. At low intensities, laser-induced periodic surface structures (LIPSS) and porous coating composed of sub-micron particles app...

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Bibliographic Details
Published in:arXiv.org 2016-04
Main Authors: Gubin, K V, Lotov, K V, Trunov, V I, Pestryakov, E V
Format: Article
Language:English
Subjects:
Ablative materials
Capillaries
Femtosecond pulses
Lasers
Online Access:Get full text
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Summary:Powerful femtosecond laser pulses that propagate through narrow ablating capillaries cause modification of capillary walls, which is studied experimentally and theoretically. At low intensities, laser-induced periodic surface structures (LIPSS) and porous coating composed of sub-micron particles appear on the walls. At higher intensities, the surface is covered by deposited droplets of the size up to 10 \(\mu\)m. In both cases, the ablated material forms a solid plug that completely blocks the capillary after several hundreds or thousands of pulses. The suggested theoretical model indicates that plug formation is a universal effect. It must take place in any narrow tube subject to ablation under the action of short laser pulses.
ISSN:2331-8422
DOI:10.48550/arxiv.1604.07135