[17a-K506-1~11] 3.6 Laser processing

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[17a-K506-1] Analysis of quantum state dynamics in aluminum excited by ultrashort laser pulses using the Wigner distribution function

〇(B)Koshi Kokubo¹, Hiroki Katow², Kenichi Ishikawa² (1.the University of Tokyo,Faculty of Engineering, 2.the University of Tokyo,School of Engineering)

Keywords:

Wigner distribution function,time-dependent density functional theory

Ultrashort pulsed lasers are drawing attention as light source for microfabrication because they can realize high precision and efficiency fabrication. The change in electronic states induced by laser irradiation can be described using two approaches. One is the quantum theoretical method based on time-dependent density functional theory (TDDFT), which offers high accuracy but demands significant computational resources. The other is the semiclassical method using Vlasov equation, which is computationally efficient but less accurate. We analyzed the Wigner distribution function in phase space using TDDFT calculations to establish a connection between the two theories. As a result, we revealed the quantum behavior of the system that persists even under intense laser irradiation.