64 citations · 155 across the 13 of their papers we have counts for
13 papers
Observation of quasi-elastic light scattering in BiFeO
Eiichi Oishi, Yasuhiro Fujii, Akitoshi Koreeda +2
We observed quasi-elastic light scattering (QELS) in BiFeO using Raman spectroscopy over a temperature range of 300-860 K. The QELS has two components: a narrow and broad compo…
Observation of terahertz magnon of Kaplan-Kittel exchange resonance in yttrium-iron garnet by Raman spectroscopy
Wei-Hung Hsu, Ka Shen, Yasuhiro Fujii +2
Backscattering Raman spectroscopic investigations were performed on an yttrium-iron garnet single crystal using linearly and circularly polarized light. A terahertz (THz) magnon of…
Detection of boson peak and fractal dynamics of disordered system using terahertz spectroscopy
Tatsuya Mori, Yue Jiang, Yasuhiro Fujii +8
Disordered systems exhibit universal excitation, referred to as the boson peak, in the terahertz region. Meanwhile, the so-called fracton is expected to appear in the nanoscale reg…
Excitation of coherent optical phonons in iron garnet by femtosecond laser pulses
Pritam Khan, Masataka Kanamaru, Wei-Hung Hsu +4
We employed femtosecond pump probe technique to investigate the dynamics of coherent optical phonons in iron garnet. A phenomenological symmetry-based consideration reveals that os…
Boson peak dynamics of glassy glucose studied by integrated terahertz-band spectroscopy
Mikitoshi Kabeya, Tatsuya Mori, Yasuhiro Fujii +4
We performed terahertz time-domain spectroscopy, low-frequency Raman scattering, and Brillouin light scattering on vitreous glucose to investigate the boson peak (BP) dynamics. In…
Intrinsic Enhancement of Dielectric Permittivity in (Nb + In) co-doped TiO2 single crystals
Masaru Kawarasaki, Kenji Tanabe, Ichiro Terasaki +1
The development of dielectric materials with colossal permittivity is important for the miniaturization of electronic devices and fabrication of high-density energy-storage devices…