173 citations · 364 across the 10 of their papers we have counts for
10 papers
Enhancement of valley selective excitation by a linearly polarized two-color laser pulse
Arqum Hashmi, Shunsuke Yamada, Kazuhiro Yabana +1
Here we proposed the valley selective excitations via a two-color (\ensuremathω + \ensuremath{2ω}) laser field, made by superimposing two linearly polarized pulses at frequencies \…
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…
Valley polarization control in WSe2 monolayer by a single-cycle laser pulse
Arqum Hashmi, Shunsuke Yamada, Atsushi Yamada +2
Abstract The valley degree of freedom in two-dimensional materials provides an opportunity to extend the functionalities of valleytronics devices. Very short valley lifetimes deman…
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…
Time-dependent density functional theory for interaction of ultrashort light pulse with thin materials
Shunsuke Yamada, Masashi Noda, Katsuyuki Nobusada +1
We present a comprehensive theoretical description for an irradiation of an ultrashort light pulse normally on thin materials based on first-principles time-dependent density funct…
SALMON: Scalable Ab-initio Light-Matter simulator for Optics and Nanoscience
Masashi Noda, Shunsuke A. Sato, Yuta Hirokawa +15
SALMON (Scalable Ab-initio Light-Matter simulator for Optics and Nanoscience, http://salmon-tddft.jp) is a software package for the simulation of electron dynamics and optical prop…
An efficient method for calculating spatially extended electronic states of large systems with a divide-and-conquer approach
Shunsuke Yamada, Fuyuki Shimojo, Ryosuke Akashi +1
We present an efficient post-processing method for calculating the electronic structure of nanosystems based on the divide-and-conquer approach to density functional theory (DC-DFT…