Influence of optical non-uniformity on the reflectance of dense plasmas

31st International Conference on Equations of State for Matter

Norman, G.E.^1 ; Saitov, I.M.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13 Bldg 2, Moscow

125412, Russia^1

关键词: Dielectric functions;    Kramers-Kronig transformation;    Non-uniformities;    Normal incidence;    Projector augmented waves;    Quantum molecular dynamics;    Three-wavelengths;    Warm dense matters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012142/pdf
DOI  :  10.1088/1742-6596/774/1/012142

来源: IOP

【 摘 要 】

We provide theoretical analysis of the reflectance of shock compressed plasmas and warm dense matter for normal incidence of laser radiation as well as for the dependence of s- and p-polarized reflectivity on incidence angle. We use density functional theory approach for the calculation of the dielectric function and reflectivity. The Kohn-Sham set of equations with the projector augmented wave (PAW) potential is solved for valent electrons. Due to the nonlocality of the PAW potentials, the longitudinal expression for the imaginary dielectric function is used. The real part is obtained by the Kramers-Kronig transformation. Quantum molecular dynamics simulation and VASP is used. Comparison with the experimental data for shock compressed xenon is performed. Three wavelengths are considered.