Kubota Group
- Affiliation
- Laser and Synchrotron Research Center
- Course
- Phys., Sci.※Pending
Research Subjects
- Development of measurement techniques for condensed matter physics using X-ray free-electron lasers
- Ultrafast lattice and electronic ordering dynamics induced by photoexcitation
- Crystal structures and electronic states under ultrahigh magnetic fields
- Crystal structure analysis using high-brightness X-rays
We focus on condensed matter physics using high-brightness hard X-rays, mainly at the large synchrotron radiation facility SPring-8 and the X-ray free-electron laser (XFEL) facility SACLA. We work on developing advanced measurement techniques that take full advantage of state-of-the-art X-ray sources, with particular interest in nonequilibrium states in solids to elucidate their crystal structures and electronic states. For example, by utilizing the short wavelength and ultrashort pulse duration of XFELs, we perform time-resolved X-ray diffraction experiments in combination with optical lasers. This technique enables direct observation of the femtosecond-scale dynamics of crystal structures and electronic orders in photoexcited strongly correlated materials. In addition, we developed a portable magnetic field generation system (PINK-02) at SACLA. Using this system, we investigate the crystal structures and electronic states of materials that emerge under ultrahigh magnetic fields exceeding 100 T through X-ray diffraction and X-ray spectroscopy. We are also actively involved in the development of next-generation advanced light sources, including SPring-8-II, in collaboration with RIKEN.
