Animated sequence of snapshots from TTM-MD simulations of laser-induced melting and resolidification in Ag targets irradiated by 10 ps laser pulses in vacuum and under confinement by a silica glass overlayer
Animated sequence of snapshots from a TTM-MD simulation of laser-induced melting and resolidification in Ag (001) targets irradiated by 10 ps laser pulses in vacuum (left panel) and under confinement by a silica glass overlayer (right panel). The absorbed fluence is 900 J/cm2 in the simulation in vacuum and 1000 J/m2 in the simulation with overlayer. The snapshots are shown with a time resolution of 100 ps. The atoms are colored by their local structural environment, so that the fcc and hcp atoms are blue and green, respectively, and the molten Ag and crystal defects are red. The top 1 nm layers of the targets are blanked to expose the underlying defect structures.
M. V. Shugaev, C.-Y. Shih, E. T. Karim, C. Wu, and L. V. Zhigilei, Generation of nanocrystalline surface layer in short pulse laser processing of metal targets under conditions of spatial confinement by solid or liquid overlayer, Appl. Surf. Sci., in press, 2017.
Full Text: doi:10.1016/j.apsusc.2017.02.030