超快激光诱导<strong>Cu</strong>薄膜熔化的神经网络分子动力学研究

超快激光诱导Cu薄膜熔化的神经网络分子动力学研究

高天雨, 曾启昱, 陈博, 康冬冬, 戴佳钰

Neural Network Molecular Dynamics Study of Ultrafast Laser-Induced Melting of Copper Nanofilms

GAO Tianyu, ZENG Qiyu, CHEN Bo, KANG Dongdong, DAI Jiayu

图5 18 mJ/cm²激光通量下Cu薄膜的演化动力学过程

Fig.5 Evolutionary dynamics of Cu thin films at the laser flux of 18 mJ/cm²
(a) evolution of ion temperature (T_i) and (T_e) over time
(b1-b4) evolutions of T_e (b1), T_i (b2), density (ρ) (b3), and pressure (P) (b4) in different regions in the z direction of the Cu film with time
(c1-c6) atomic scale structural evolutions at time t = 0 ps (c1), 50 ps (c2), 100 ps (c3, c6), 150 ps (c4), and 200 ps (c5) (Fig.5c6 is the locally enlarged view of Fig.5c3, and polyhedral surface meshes (white interface) around fcc-type (brass) and liquid-type (gray) particles are constructed to highlight the heterogeneous phase transition)