A first-principles simulation method for ultra-fast nano-optics Mitsuharu Uemoto, Kazuhiro Yabana, Shunsuke A. Sato, Yuta Hirokawa and Taisuke Boku EPJ Web Conf., 205 (2019) 04023 Published online: 16 April 2019 DOI: 10.1051/epjconf/201920504023