<xml>
  <records>
    <record>
       <contributors>
          <authors>
             <author>Murata, T.</author>
             <author>Hachiya, K.</author>
             <author>Katsurayama, T.</author>
             <author>Kii, T.</author>
             <author>Konstantin, T.</author>
             <author>Masuda, K.</author>
             <author>Nogi, T.</author>
             <author>Ohgaki, H.</author>
             <author>Suphakul, S.</author>
             <author>Torgasin, K.</author>
             <author>Yoshida, K.</author>
             <author>Zen, H.</author>
          </authors>
       </contributors>
       <titles>
          <title>
             Development of Phonon Dynamics Measurement System by MIR-FEL and Pico-second Laser
          </title>
       </titles>
       <pages>WEP010</pages>
       <keywords>
          <keyword>FEL</keyword>
          <keyword>laser</keyword>
          <keyword>scattering</keyword>
          <keyword>timing</keyword>
          <keyword>lattice</keyword>
       </keywords>
       <dates>
          <year>2015</year>
          <pub-dates>
             <date>2015-12</date>
          </pub-dates>
       </dates>
       <abstract>
          Coherent control of a lattice vibration in bulk solid (mode-selective phonon excitation: MSPE) is one of the attractive methods in the solid state physics because it becomes a powerful tool for the study of ultrafast lattice dynamics (e.g. electron-phonon interaction and phonon-phonon interaction). Not only for that, MSPE can control electronic, magnetic, and structural phases of materials. In 2013, we have directly demonstrated MSPE of a bulk material with MIR-FEL (KU-FEL) by anti-Stokes Raman scattering spectroscopy. For the next step, we are starting a phonon dynamics measurement to investigate the difference of physical property between thermally excited phonon (phonon of equilibrium state) and optically excited phonon (phonon of non-equilibrium state) by time-resolved method in combination with a pico-second VIS laser. By using pico-second laser, we also expect to perform the anti-Stokes hyper-Raman scattering spectroscopy to extend MSPE method to the phonon mode which has Raman inactive . As the first step, we have commissioned the time-resolved phonon measurement system and started measurement on 6H-SiC. In this conference, we will present the outline of measurement system, and experimental results.
       </abstract>
    </record>
  </records>
</xml>
