5 papers
Ultrafast Spin Injection in Graphene via Dynamical Carrier Filtering at Transition Metal Dichalcogenide Interfaces
Shunsuke Yamada, Arqum Hashmi, Tomohito Otobe
We report a real-time first-principles study of ultrafast spin injection in a WSe-graphene heterobilayer under circularly polarized laser irradiation, using time-dependent dens…
Electron Excitation Probability in Dielectrics under Two-color Intense Laser Fields
Mizuki Tani, Kenichi L. Ishikawa, Tomohito Otobe
Two-color laser fields offer significantly enhanced control over electron excitation dynamics under ultrashort intense laser pulses compared to monochromatic fields. However, their…
SALMON VR: Visualizing Light-Matter Dynamics
Tomohito Otobe, Tatsuya Ogusu, Mizuki Tani +1
This study presents SALMON VR, a visualization program designed to visualize the time evolution of electronic density changes and vector potentials in virtual reality (VR) space. T…
Saturable absorption in highly excited silicon and its suppression at the surface
Shunsuke Yamada, Tomohito Otobe
Nonlinear electronic excitation in laser-irradiated silicon at finite electron temperatures is numerically investigated by first-principles calculations based on the time-dependent…
Influence of Point Defects on Laser-Induced Excitation in Silicon
Tomohito Otobe, Eiyu Gushiken
We studied the influence of defect states on the laser excitation process in silicon using time-dependent density functional theory. We assumed two types of point defects: intersti…