Laser ablation in liquid is a scalable nanoparticle production method with applications in areas like catalysis and biomedi-cine. Due to laser-liquid interactions, different energy dissipation channels such as absorption by the liquid and scatter-ing at the ablation plume and cavitation bubble lead to reduced laser energy available for nanoparticle production. Ul-trashort pulse durations cause unwanted nonlinear effects in the liquid, and for ns pulses, intra-pulse energy deposition attenuation effects are to be expected. However, intermediate pulse durations ranging from hundreds of picoseconds up to one nanosecond have rarely been studied in particular in single-pulse settings. In this study, we explore the pico- to nanosecond pulse duration regimes to find the pulse duration with the highest ablation efficiency. We find that pulse dur-ations around 1–2 ns enable the most efficient laser ablation in liquid since the laser beam shielding by the ablation plume and cavitation bubble sets in only at longer pulse durations. Furthermore, pump-probe microscopy imaging re-veals that the plume dynamics in liquids start to differ from plume dynamics in air at about 2 ns after pulse impact.

Sarah Dittrich;Maximilian Spellauge;Stephan Barcikowski;Heinz P.Huber;Bilal G?kce

Technical Chemistry I and Center of Nanointegration Duisburg-Essen(CENIDE),University of Duisburg-Essen,Universitaetsstr.7,45141 Essen,Germany;Department of Applied Sciences and Mechatronics,Munich University of Applied Sciences,Lothstr.34,80335 Munich,Germany;Materials Science and Additive Manufacturing,School of Mechanical Engineering and Safety Engineering,University of Wuppertal,Gau?stra?e 20,42119 Wuppertal,Germany

光电进展（英文版）

[1]Sarah Dittrich;Maximilian Spellauge;Stephan Barcikowski;Heinz P.Huber;Bilal G?kce-.Time resolved studies reveal the origin of the unparalleled high efficiency of one nanosecond laser ablation in liquids)[J].光电进展（英文版）,2022(06):44-54

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