Femtosecond ultraviolet laser ablation of silver and comparison with nanosecond ablation

Bo Toftmann Christensen, B. Doggett, C. Budtz-Jørgensen, Jørgen Schou, J. G. Lunney

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The ablation plume dynamics arising from ablation of silver with a 500 fs, 248 nm laser at ~2 J cm-2 has been studied using angle-resolved Langmuir ion probe and thin film deposition techniques. For the same laser fluence, the time-of-flight ion signals from femtosecond and nanosecond laser ablation are similar; both show a singly peaked time-of-flight distribution. The angular distribution of ion emission and the deposition are well described by the adiabatic and isentropic model of plume expansion, though distributions for femtosecond ablation are significantly narrower. In this laser fluence regime, the energy efficiency of mass ablation is higher for femtosecond pulses than for nanosecond pulses, but the ion production efficiency is lower.
Original languageEnglish
Article number083304
JournalJournal of Applied Physics
Issue number8
Number of pages7
Publication statusPublished - 2013

Bibliographical note

Copyright (2013) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 113, 083304 (2013) and may be found at http://jap.aip.org/resource/1/JAPIAU/v113/i8.

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