Ab initio model of optical properties of two-temperature warm dense matter
Abstract
We present a model to describe thermophysical and optical properties of two-temperature systems consisted of heated electrons and cold ions in a solid lattice that occur during ultrafast heating experiments. Our model is based on ab initio simulations within the framework of density functional theory. The optical properties are obtained by evaluating the Kubo-Greenwood formula. By applying the material parameters of our ab initio model to a two-temperature model we are able to describe the temperature relaxation process of femtosecond-laser-heated gold and its optical properties within the same theoretical framework. Recent time-resolved measurements of optical properties of ultrafast heated gold revealed the dynamics of the interaction between femtosecond laser pulses and solid state matter. Different scenarios obtained from simulations of our study are compared with experimental data [Chen, Holst, Kirkwood, Sametoglu, Reid, Tsui, Recoules, and Ng, Phys. Rev. Lett. 110, 135001 (2013)].
Keywords
Cite
@article{arxiv.1802.04336,
title = {Ab initio model of optical properties of two-temperature warm dense matter},
author = {Bastian Holst and Vanina Recoules and Stephane Mazevet and Marc Torrent and Andrew Ng and Zhijiang Chen and Sean E. Kirkwood and V. Sametoglu and M. Reid and Ying Y. Tsui},
journal= {arXiv preprint arXiv:1802.04336},
year = {2018}
}