Investigation of the ultrashort pulsed laser processing of zinc at 515 nm: Morphology, crystallography and ablation threshold

H. Mustafa* (Corresponding Author), D.T.A. Matthews, G.R.B.E. Römer

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    2 Citations (Scopus)
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    Abstract

    Bulk polycrystalline pure zinc is ablated in air using a picosecond laser source to perform single pulse and multi-pulse processing at a wavelength of 515 nm. The geometries and surface morphologies of the resulting craters are determined by confocal laser scanning microscopy and scanning electron microscopy. Further, the ablation threshold and its corresponding incubation coefficient is determined from the ablated volume for multiple laser pulses. Two different thermal ablation regimes are identified. The single pulse ablation thresholds are found to equal 0.1 J/cm 2 and 0.68 J/cm 2 respectively for the two regimes. It is found that the incubation coefficients are larger than unity, indicating material removal becomes energy expensive for multiple pulse laser irradiation. It is also found that an irradiated area undergoes laser induced preferred crystal orientation.

    Original languageEnglish
    Article number107675
    JournalMaterials and Design
    Volume169
    Early online date5 Mar 2019
    DOIs
    Publication statusPublished - May 2019

    Keywords

    • Ablation threshold
    • Picosecond laser
    • Polycrystalline zinc

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