Ablation and nanostructuring of metals by femtosecond laser pulses

Journal Article · Mon Jun 30 04:00:00 EDT 2014 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2014V044N06ABEH015448· OSTI ID:22395856

Ashitkov, S I; Komarov, P S; Ovchinnikov, A V; Struleva, E V; Agranat, M B ^[1]; Zhakhovskii, V V ^[2]; Inogamov, N A ^[3]

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1. Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow (Russian Federation)
2. All-Russian Institute of Automatics, Moscow (Russian Federation)
3. Landau Institute for Theoretical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region (Russian Federation)

Using an interferometric continuous monitoring technique, we have investigated the motion of the surface of an aluminium target in the case of femtosecond laser ablation at picosecond time delays relative to the instant of laser exposure. Measurements of the temporal target dispersion dynamics, molecular dynamics simulation results and the morphology of the ablation crater have demonstrated a thermomechanical (spall) nature of the disruption of the condensed phase due to the cavitation-driven formation and growth of vapour phase nuclei upon melt expansion, followed by the formation of surface nanostructures upon melt solidification. The tensile strength of heated aluminium in a condensed state has been determined experimentally at an expansion rate of ∼10{sup 9} s{sup -1}. (extreme light fields and their applications)

• OSTI ID: 22395856
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 6 Vol. 44; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABLATION
ALUMINIUM
CAVITATION
LASERS
MOLECULAR DYNAMICS METHOD
NANOSTRUCTURES
SOLIDIFICATION
SURFACES
TENSILE PROPERTIES
TIME DELAY