84 citations · 128 across the 6 of their papers we have counts for
6 papers
High harmonic spin-orbit angular momentum generation in crystalline solids preserving multiscale dynamical symmetry
Kohei Nagai, Takuya Okamoto, Yasushi Shinohara +2
Symmetries essentially provide conservation rules in nonlinear light-matter interactions, that facilitate control and understanding of photon conversion processes or electron dynam…
Enhancement of Zener tunneling rate via electron-hole attraction within a time-dependent quasi-Hartree-Fock method
Yasushi Shinohara, Haruki Sanada, Katsuya Oguri
The tunneling process, a prototypical phenomenon of nonperturbative dynamics, is a natural consequence of photocarrier generation in materials irradiated by a strong laser. Common…
Observation of Acoustically Induced Dressed States of Rare-Earth Ions
Ryuichi Ohta, Gregoire Lelu, Xuejun Xu +9
Acoustically induced dressed states of long-lived erbium ions in a crystal are demonstrated. These states are formed by rapid modulation of two-level systems via strain induced by…
1-MHz operation of 1.7-cycle multiple plate compression at 35-W average output power
Takuya Okamoto, Yoji Kunihashi, Yasushi Shinohara +3
We generated 1.7-cycle and 35-J pulses at a 1-MHz repetition rate by using two-stage multiple plate continuum compression of Yb-laser pulses with 80-W average input power. By ad…
Spatially resolved spectral phase interferometry with isolated attosecond pulse
Hiroki Mashiko, Ming-Chang Chen, Koji Asaga +5
We characterized spatially resolved spectral phase interferometry with an isolated attosecond pulse (IAP). The measured spatial-spectral interferogram and spectral interference fri…
Theory of optical transitions in graphene nanoribbons
K. Sasaki, K. Kato, Y. Tokura +2
Matrix elements of electron-light interactions for armchair and zigzag graphene nanoribbons are constructed analytically using a tight-binding model. The changes in wavenumber ($Δn…