1:30 PM - 1:45 PM
[18p-N304-2] Ab initio study for femtosecond laser pulse excitiation process of Al thin slub and interatomic potential modulation based on time-dependent density functional theory
Keywords:First principles calculation, Time dependent density functional theory, Laser processing
Laser processing techniques using ultrashort laser pulses have been widely used in both fundamental physics and industrial fields, while transient properties of materials after excitation are not fully understood as yet. In this talk we report an ab initio simulation for real time evolution of an atomically thin aluminum slab system after laser pulse irradiation based on the time-dependent density functional theory (TDDFT). We talk about the significant reduction of phenomenological interatomic force constants and possible explanation of its behavior based on collective electronic excitations such as plasmon.