Dynamics of Nanoscale Phase Decomposition in Laser Ablation
Abstract
Femtosecond laser ablation is a process that bears both fundamental physics interest and has wide industrial applications. For decades, the lack of probes on the relevant time and length scales has prevented access to the highly nonequilibrium phase decomposition processes triggered by laser excitation. Enabled by the unprecedented intense femtosecond X-ray pulses delivered by an X-ray free electron laser, we report here results of time-resolved small angle scattering measurements on the dynamics of nanoscale phase decomposition in thin gold films upon femtosecond laser-induced ablation. By analyzing the features imprinted onto the small angle diffraction patterns, the transient heterogeneous density distributions within the ablation plume as obtained from molecular dynamics simulations get direct experimental confirmation.
Keywords
Cite
@article{arxiv.2407.10505,
title = {Dynamics of Nanoscale Phase Decomposition in Laser Ablation},
author = {Yanwen Sun and Chaobo Chen and Thies J. Albert and Haoyuan Li and Mikhail I. Arefev and Ying Chen and Mike Dunne and James M. Glownia and Matthias Hoffmann and Matthew J. Hurley and Mianzhen Mo and Quynh L. Nguyen and Takahiro Sato and Sanghoon Song and Peihao Sun and Mark Sutton and Samuel Teitelbaum and Antonios S. Valavanis and Nan Wang and Diling Zhu and Leonid V. Zhigilei and Klaus Sokolowski-Tinten},
journal= {arXiv preprint arXiv:2407.10505},
year = {2024}
}
Comments
Main manuscript with 32 pages incl. 9 figures + supplementary materials with 16 pages incl. 5 figures