403 citations · 3.4k across the 79 of their papers we have counts for
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Subcycle control of valley-selective excitation via dynamical Franz-Keldysh effect in WSe monolayer
Shunsuke Yamada, Kazuhiro Yabana, Tomohito Otobe
This study performed first-principles calculations based on the time-dependent density functional theory to control the valley degree of freedom relating to the dynamical Franz-Kel…
Propagation effects in high-harmonic generation from dielectric thin films
Shunsuke Yamada, Tomohito Otobe, David Freeman +2
Theoretical investigation is conducted of high-order harmonic generation (HHG) in silicon thin films to elucidate the effect of light propagation in reflected and transmitted waves…
Nonlinear dynamics of electromagnetic field and valley polarization in WSe monolayer
Arqum Hashmi, Shunsuke Yamada, Atsushi Yamada +2
Linear and nonlinear optical response of WSe monolayer is investigated by two-dimensional Maxwell plus time-dependent density functional theory with spin-orbit interaction. B…
High order harmonic generation in semiconductors driven at near- and mid-IR wavelengths
David Freeman, Shunsuke Yamada, Atsushi Yamada +2
We study high order harmonics generation (HHG) in crystalline silicon and diamond subjected to near and mid-infrared laser pulses. We employ time-dependent density functional theor…
Determining the optimum thickness for high harmonic generation from nanoscale thin films: an ab initio computational study
Shunsuke Yamada, Kazuhiro Yabana
We theoretically investigate high harmonic generation (HHG) from silicon thin films with thicknesses from a few atomic layers to a few hundreds of nanometers, to determine the most…
Symmetry properties of attosecond transient absorption spectroscopy in crystalline dielectrics
Shunsuke Yamada, Kazuhiro Yabana
We theoretically investigate a relation between the crystalline symmetry and the transient modulation of optical properties of crystalline dielectrics in pump-probe measurements us…
Attosecond state-resolved carrier motion in quantum materials probed by soft X-ray XANES
Barbara Buades, Antonio Picon, Emma Berger +16
Recent developments in attosecond technology led to tabletop X-ray spectroscopy in the soft X-ray range, thus uniting the element- and state-specificity of core-level x-ray absorpt…
Velocity-gauge real-time TDDFT within a numerical atomic orbital basis set
C. D. Pemmaraju, F. D. Vila, J. J. Kas +4
The interaction of laser fields with solid-state systems can be modeled efficiently within the velocity-gauge formalism of real-time time dependent density functional theory (RT-TD…
Nonlinear electronic excitations in crystalline solids using meta-generalized gradient approximation and hybrid functional in time-dependent density functional theory
Shunsuke A. Sato, Yasutaka Taniguchi, Yasushi Shinohara +1
We develop numerical methods to calculate electron dynamics in crystalline solids in real-time time-dependent density functional theory employing exchange-correlation potentials wh…
Efficient basis expansion for describing linear and nonlinear electron dynamics in crystalline solids
Shunsuke A. Sato, Kazuhiro Yabana
We propose an efficient basis expansion for electron orbitals to describe real-time electron dynamics in crystalline solids. Although a conventional grid representation in the thre…
Ab Initio Simulation of Electrical Currents Induced by Ultrafast Laser Excitation of Dielectric Materials
Georg Wachter, Christoph Lemell, Joachim Burgdörfer +3
We theoretically investigate the generation of ultrafast currents in insulators induced by strong few-cycle laser pulses. Ab initio simulations based on time-dependent density func…
First-principles simulation of the optical response of bulk and thin-film α-quartz irradiated with an ultrashort intense laser pulse
Kyung-Min Lee, Chul Min Kim, Shunsuke A. Sato +4
A computational method based on a first-principles multiscale simulation has been used for calculating the optical response and the ablation threshold of an optical material irradi…
Dielectric response of laser-excited silicon
S. A. Sato, K. Yabana, Y. Shinohara +2
We calculate the dielectric response of crystalline silicon following irradiation by a high-intensity laser pulse, modeling the dynamics by time-dependent density functional theory…
Nonadiabatic generation of coherent phonons
Y. Shinohara, S. A. Sato, K. Yabana +3
The time-dependent density functional theory (TDDFT) is the leading computationally feasible theory to treat excitations by strong electromagnetic fields. Here the theory is applie…