13:30 〜 14:00 ▲ [9p-Z23-2] [INVITED] Terahertz spectroscopy for dynamics in Dirac and Weyl semimetals toward high-speed electronics and spintronics 〇Ryusuke Matsunaga1、Natsuki Kanda1、Takuya Matsuda1 (1.ISSP. The Univ. Tokyo)