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Picosecond dual-pulse laser ablation of fused silica.
- Source :
-
Applied Physics A: Materials Science & Processing . May2022, Vol. 128 Issue 5, p1-7. 7p. 3 Diagrams, 4 Graphs. - Publication Year :
- 2022
-
Abstract
- This study discussed the ablation thresholds of picosecond laser dual pulses in fused silica with different temporal separations. The results indicate that the lowest damage threshold of the dual-pulse ablation is at a temporal separation of 100 ps, which is only half of the threshold of the conventional pulse ablation. Furthermore, the energy ratios of two sub-pulses were optimized to minimize the thresholds. Regarding the underlying physical mechanisms, this study found that the first sub-pulses initially excited the electrons of the fused silica, and subsequently induced free-electron shielding and self-trapped exciton seed generation at different temporal separations. This either decreased or increased the material absorption of the second sub-pulses, resulting in changes of the ablation threshold of the fused silica. The results of the picosecond dual-pulse ablation could provide further understanding into the interaction mechanisms of dual pulses to transparent materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09478396
- Volume :
- 128
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Applied Physics A: Materials Science & Processing
- Publication Type :
- Academic Journal
- Accession number :
- 156930806
- Full Text :
- https://doi.org/10.1007/s00339-022-05575-0