6:15 PM - 6:30 PM
[10p-N305-18] First principles calculation on the anisotropy of nonlinear absorption by an insulator
Keywords:insulator, First principles calculation, nonlinear absorption
Laser processing is a multi-scale and non-equilibrium physical phenomenon ranging from nm to mm in space and fs to μs in time. In particular, when lasers with pulse widths on the order of femtoseconds are used, nonlinear optical absorption plays an important role in the initial process of processing.
In such nonlinear phenomena, it is effective to use theoretical simulations in addition to experiments to clarify the microscopic mechanisms. In such an approach, first-principles calculations are effective in describing the individuality of materials from the atomic scale. In this study, we have systematically investigated the nonlinear optical absorption of bulk α-quartz as an example of insulator in terms of laser intensity and polarization direction using time-dependent density functional theory (TDDFT), which is a typical method to calculate the electronic dynamics of solids ab initio.
In such nonlinear phenomena, it is effective to use theoretical simulations in addition to experiments to clarify the microscopic mechanisms. In such an approach, first-principles calculations are effective in describing the individuality of materials from the atomic scale. In this study, we have systematically investigated the nonlinear optical absorption of bulk α-quartz as an example of insulator in terms of laser intensity and polarization direction using time-dependent density functional theory (TDDFT), which is a typical method to calculate the electronic dynamics of solids ab initio.