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, the laser-induced periodic surface structures and porous coating composed of sub-micron particles appear...

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Bibliographic Details
Published in:Journal of applied physics 2016-09, Vol.120 (11)
Main Authors: Gubin, K. V., Lotov, K. V., Trunov, V. I., Pestryakov, E. V.
Format: Article
Language:English
Subjects:
Ablative materials
Applied physics
Capillaries
Femtosecond pulses
Lasers
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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, the laser-induced periodic surface structures 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 μm. 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 the 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:0021-8979
1089-7550
DOI:10.1063/1.4962457