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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…
Critical behavior of the damping rate of GHz acoustic phonons in SrTiO3 at the antiferrodistortive phase transition measured by time- and frequency-resolved Brillouin scattering
Lena Maerten, Andre Bojahr, Matthias Reinhardt +3
We determine the temperature dependent damping rate of longitudinal acoustic phonons in SrTiO3 using frequency domain Brillouin scattering and time domain Brillouin scattering. We…
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…