Laser ablation of bicomponent systems: A probe of molecular ejection mechanisms

A combined experimental and molecular dynamics simulation study of laser ablation of a model bicomponent system with solutes of different volatility provides a consistent picture of the mechanisms of material ejection. The comparison of the ejection yields shows that there are two distinct regimes o...

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Veröffentlicht in:Applied physics letters 2001-03, Vol.78 (11), p.1631-1633
Hauptverfasser: Yingling, Yaroslava G., Zhigilei, Leonid V., Garrison, Barbara J., Koubenakis, Antonis, Labrakis, John, Georgiou, Savas
Format: Artikel
Sprache:eng
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Zusammenfassung:A combined experimental and molecular dynamics simulation study of laser ablation of a model bicomponent system with solutes of different volatility provides a consistent picture of the mechanisms of material ejection. The comparison of the ejection yields shows that there are two distinct regimes of molecular ejection, desorption at low laser fluences, and a collective ejection of a volume of material or ablation at higher fluences. Ejection of volatile solutes dominates in the desorption regime, whereas nonvolatile solutes are ejected only in the ablation regime.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1353816