34 citations · 132 across the 12 of their papers we have counts for
10 papers · 1 filter
Photo-induced Tellurium segregation in
Takumi Fukuda, Ryota Kaburauchi, Yuta Saito +4
We report on the coherent phonon spectroscopy of polymorphic single crystals using a femtosecond-pulsed laser to investigate the relationship between structural p…
Ultrafast scattering dynamics of coherent phonons in BiSb in the Weyl semimetal phase
Yuta Komori, Yuta Saito, Paul Fons +1
We investigate ultrafast phonon dynamics in the BiSb alloy system for various compositions using a reflective femtosecond pump-probe technique. The coherent optic…
The effect of ion irradiation on dephasing of coherent optical phonons in GaP
Takuto Ichikawa, Yuta Saito, Muneaki Hase
The dephasing of coherent longitudinal optical (LO) phonons in ion-irradiated GaP has been investigated with a femtosecond pump-probe technique based on electro-optic sampling. The…
Ultrafast dynamics of the low frequency shear mode in
T. Fukuda, K. Makino, Y. Saito +4
We report on the dynamics of coherent phonons in semimetal 1T'-MoTe2 using femtosecond pump-probe spectroscopy. On an ultrafast sub-picosecond time scale at room temperature, a low…
All-optical detection of periodic structure of chalcogenide superlattice using coherent folded acoustic phonons
Takara Suzuki, Yuta Saito, Paul Fons +3
Chalcogenide superlattices (SL) consist of alternate stacking of GeTe and SbTe layers. The structure can become a 3D topological insulator depending on the constituent…
Photon Energy Dependence of Kerr Rotation in Chalcogenide Superlattices
Takara Suzuki, Richarj Mondal, Yuta Saito +5
We report on pump-probe based helicity dependent time-resolved Kerr measurements of chalcogenide superlattices, consisting of alternately stacked GeTe and SbTe layers u…
Zener Tunneling Breakdown in Phase-Change Materials Revealed by Intense Terahertz Pulses
Yasuyuki Sanari, Takehiro Tachizaki, Yuta Saito +8
We have systematically investigated the spatial and temporal dynamics of crystallization that occurs in the phase-change material Ge2Sb2Te5 upon irradiation with an intense THz pul…
Ultrafast Dynamics of Electron-phonon Coupling in Transition-metal Dichalcogenides
Kotaro Makino, Yuta Saito, Shuuto Horii +6
Time-domain femtosecond laser spectroscopic measurements of the ultrafast lattice dynamics in 2H-MoTe2 bulk crystals were carried out to understand the carrier-phonon interactions…
A cascading nonlinear magneto-optical effect in topological insulators
Richarj Mondal, Yuta Saito, Yuki Aihara +5
Topological insulators (TIs) are characterized by possessing metallic (gapless) surface states and a finite band-gap state in the bulk. As the thickness of a TI layer decreases dow…
Coherent phonon study of (GeTe)(SbTe) interfacial phase change memory materials
Kotaro Makino, Yuta Saito, Paul Fons +4
The time-resolved reflectivity measurements were carried out on the interfacial phase change memory (iPCM) materials ([(GeTe)(SbTe)] and [(GeTe)…