Ablation enhancement of metal in ultrashort double-pulse experiments

Kaihu Zhang, Jiabo Zhang, Lan Jiang, Xin Li, Yan Liu, Bo Li, Yongfeng Lu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report an ablation enhancement (both deepening and widening in ablation profiles) on nickel by ultrashort double-pulse laser irradiation, an exception of the typical reduction trend observed in ablation rates for metals irradiated with double-pulse excitations. Maximized at a pulse-separation (τ s ) of approximately 4 ps, the enhancement was observed before τ s was increased to approximately the electron-lattice energy relaxation time. An achievement of ablation, by temporal shaping a weak pulse with energy well below the single-pulse ablation threshold into two considerably weaker pulses, was demonstrated. It is proposed that the enhanced electron-phonon coupling and drop of electronic heat conductivity, both of which result from the reductions in electron temperature (by pulse shaping), co-contribute to the widening in ablation profiles, while the former one is responsible for the deepening. This letter proposed an ablation enhancement approach to ultrashort laser processing of nickel.

Original languageEnglish (US)
Article number261906
JournalApplied Physics Letters
Volume112
Issue number26
DOIs
StatePublished - Jun 25 2018

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ablation
augmentation
pulses
metals
nickel
lattice energy
profiles
lasers
electrons
relaxation time
electron energy
trends
heat
conductivity
irradiation
thresholds
electronics
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Ablation enhancement of metal in ultrashort double-pulse experiments. / Zhang, Kaihu; Zhang, Jiabo; Jiang, Lan; Li, Xin; Liu, Yan; Li, Bo; Lu, Yongfeng.

In: Applied Physics Letters, Vol. 112, No. 26, 261906, 25.06.2018.

Research output: Contribution to journalArticle

Zhang, K, Zhang, J, Jiang, L, Li, X, Liu, Y, Li, B & Lu, Y 2018, 'Ablation enhancement of metal in ultrashort double-pulse experiments', Applied Physics Letters, vol. 112, no. 26, 261906. https://doi.org/10.1063/1.5030757
Zhang K, Zhang J, Jiang L, Li X, Liu Y, Li B et al. Ablation enhancement of metal in ultrashort double-pulse experiments. Applied Physics Letters. 2018 Jun 25;112(26). 261906. https://doi.org/10.1063/1.5030757
Zhang, Kaihu ; Zhang, Jiabo ; Jiang, Lan ; Li, Xin ; Liu, Yan ; Li, Bo ; Lu, Yongfeng. / Ablation enhancement of metal in ultrashort double-pulse experiments. In: Applied Physics Letters. 2018 ; Vol. 112, No. 26.
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