Effect of surface roughness on the ultrashort pulsed laser ablation fluence threshold of zinc and steel

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Abstract

The single and multiple pulse laser ablation threshold of zinc and steel at picosecond laser pulse duration is studied as a function of initial surface roughness at laser wavelengths of 515 and 1030 nm. The initial surface topographies and the resulting crater morphologies are analyzed using confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Reflectivity measurements of the initial surfaces show increased absorptivity with increasing surface roughness. It was found that the single pulse ablation threshold increases with increasing effective surface area; the latter resulting from surface roughness. Rougher surfaces tend to have a higher degree of incubation as well. From the experimental and simulation results, it appears that the absorbed energy contributes more to residual heat than to material ablation when effective surface area increases.
Original languageEnglish
Pages (from-to)10-21
JournalApplied surface science
Volume488
Early online date15 May 2019
DOIs
Publication statusPublished - 15 Sep 2019

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Laser ablation
Pulsed lasers
Zinc
Surface roughness
Steel
Ablation
Laser pulses
Lasers
Surface topography
Microscopic examination
Scanning
Wavelength
Scanning electron microscopy

Cite this

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title = "Effect of surface roughness on the ultrashort pulsed laser ablation fluence threshold of zinc and steel",
abstract = "The single and multiple pulse laser ablation threshold of zinc and steel at picosecond laser pulse duration is studied as a function of initial surface roughness at laser wavelengths of 515 and 1030 nm. The initial surface topographies and the resulting crater morphologies are analyzed using confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Reflectivity measurements of the initial surfaces show increased absorptivity with increasing surface roughness. It was found that the single pulse ablation threshold increases with increasing effective surface area; the latter resulting from surface roughness. Rougher surfaces tend to have a higher degree of incubation as well. From the experimental and simulation results, it appears that the absorbed energy contributes more to residual heat than to material ablation when effective surface area increases.",
author = "Hasib Mustafa and Marek Mezera and Matthews, {David Thomas Allan} and R{\"o}mer, {Gerardus Richardus, Bernardus, Engelina}",
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T1 - Effect of surface roughness on the ultrashort pulsed laser ablation fluence threshold of zinc and steel

AU - Mustafa, Hasib

AU - Mezera, Marek

AU - Matthews, David Thomas Allan

AU - Römer, Gerardus Richardus, Bernardus, Engelina

PY - 2019/9/15

Y1 - 2019/9/15

N2 - The single and multiple pulse laser ablation threshold of zinc and steel at picosecond laser pulse duration is studied as a function of initial surface roughness at laser wavelengths of 515 and 1030 nm. The initial surface topographies and the resulting crater morphologies are analyzed using confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Reflectivity measurements of the initial surfaces show increased absorptivity with increasing surface roughness. It was found that the single pulse ablation threshold increases with increasing effective surface area; the latter resulting from surface roughness. Rougher surfaces tend to have a higher degree of incubation as well. From the experimental and simulation results, it appears that the absorbed energy contributes more to residual heat than to material ablation when effective surface area increases.

AB - The single and multiple pulse laser ablation threshold of zinc and steel at picosecond laser pulse duration is studied as a function of initial surface roughness at laser wavelengths of 515 and 1030 nm. The initial surface topographies and the resulting crater morphologies are analyzed using confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Reflectivity measurements of the initial surfaces show increased absorptivity with increasing surface roughness. It was found that the single pulse ablation threshold increases with increasing effective surface area; the latter resulting from surface roughness. Rougher surfaces tend to have a higher degree of incubation as well. From the experimental and simulation results, it appears that the absorbed energy contributes more to residual heat than to material ablation when effective surface area increases.

U2 - 10.1016/j.apsusc.2019.05.066

DO - 10.1016/j.apsusc.2019.05.066

M3 - Article

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EP - 21

JO - Applied surface science

JF - Applied surface science

SN - 0169-4332

ER -