The role of plasma in ablation of materials by ultrashort laser pulses

The role of plasma in ablation of materials by ultrashort laser pulses

The ablative formation of deep channels in steel by femtosecond and picosecond laser pulses is studied. A significant screening of the incident energy inside deep channels is found to occur due to the air breakdown at ablated microparticles. The breakdown thresholds and the microparticle precipitati...

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Veröffentlicht in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2001-05, Vol.31 (5), p.378-382
Hauptverfasser: Klimentov, Sergei M, Kononenko, Taras V, Pivovarov, Pavel A, Garnov, Sergei V, Konov, Vitalii I, Prokhorov, A M, Breitling, D, Dausinger, F
Format: Artikel
Sprache:eng
Schlagworte:
ABLATION
ALLOYS
CARBON ADDITIONS
ELECTROMAGNETIC RADIATION
IRON ALLOYS
IRON BASE ALLOYS
LASER RADIATION
MATERIALS SCIENCE
MICROSTRUCTURE
PARTICLES
PLASMA
PRECIPITATION
PULSES
RADIATIONS
SCREENING
SEPARATION PROCESSES
STEELS
TRANSITION ELEMENT ALLOYS
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Zusammenfassung:The ablative formation of deep channels in steel by femtosecond and picosecond laser pulses is studied. A significant screening of the incident energy inside deep channels is found to occur due to the air breakdown at ablated microparticles. The breakdown thresholds and the microparticle precipitation times are estimated. This kind of plasma screening stabilises the linear ablation rate and causes a significant channel broadening. (femtosecond technologies)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2001v031n05ABEH001958