20 citations · 38 across the 6 of their papers we have counts for
6 papers
Ultrafast Spin Injection in Graphene via Dynamical Carrier Filtering at Transition Metal Dichalcogenide Interfaces
Shunsuke Yamada, Arqum Hashmi, Tomohito Otobe
We report a real-time first-principles study of ultrafast spin injection in a WSe-graphene heterobilayer under circularly polarized laser irradiation, using time-dependent dens…
Ultrafast Optical Control of Multi-Valley States in 2D SnS
Arqum Hashmi, M. Umar Farooq, Mizuki Tani +3
We theoretically study the ultrafast optical control of multiple valley states in two-dimensional (2D) tin sulfide (SnS) monolayers, a member of the layered group-IV monochalcogeni…
Strong Field Optical Hall Effect in 2D Weyl Semimetal
M. Umar Farooq, Arqum Hashmi, Mizuki Tani +4
The study of interplay between the geometric nature of Bloch electrons and transverse responses under strong field offers new opportunities for optoelectronic applications. Here, w…
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 \…
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…