1.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kyoto UniversityJP26 papers
- The University of OsakaJP7 papers
- Nagoya UniversityJP5 papers
- Japan Science and Technology AgencyJP4 papers
- National University of SingaporeSG4 papers
- Japan Atomic Energy AgencyJP2 papers
- National Institute of Advanced Industrial Science and TechnologyJP2 papers
- Waseda UniversityJP2 papers
- Advanced Science Research CenterJP1 paper
- Ca' Foscari University of VeniceIT1 paper
- Centre National de la Recherche ScientifiqueFR1 paper
- Chiba UniversityJP1 paper
26 papers
Exciton diffusion in a hBN-encapsulated monolayer MoSe2
T. Hotta, S. Higuchi, A. Ueda +7
Excitons, quasi particles composed of an electron and a hole, play an important role in optical responses in low-dimensional nanostructures. In this work, we have investigated exci…
Observation of drastic electronic structure change in one-dimensional moiré crystals
Sihan Zhao, Pilkyung Moon, Yuhei Miyauchi +3
We report the first experimental observation of strong coupling effect in one-dimensional moiré crystals. We study one-dimensional double-wall carbon nanotubes (DWCNTs) in which va…
Universal effects of solvent species on the stabilized structure of a protein
Tomohiko Hayashi, Masao Inoue, Emanuele Petretto +3
We investigate the effects of solvent specificities on the stability of the native structure (NS) of a protein on the basis of our free-energy function (FEF). We use CPB-bromodomai…
Exciton-plasmon Coupling and Electromagnetically Induced Transparency in Monolayer Semiconductors Hybridized with Ag Nanoparticles
Zhao Weijie, Wang Shunfeng, Liu Bo +9
Hybrid systems of excitons strongly coupled to localized surface plasmons supported by metallic nanoparticles define a new approach to control light-matter interactions. Here, we r…
Evidence for Fast Interlayer Energy Transfer in MoSe2/WS2 Heterostructures
Daichi Kozawa, Alexandra Carvalho, Ivan Verzhbitskiy +6
Strongly bound excitons confined in two-dimensional (2D) semiconductors are dipoles with a perfect in-plane orientation. In a vertical stack of semiconducting 2D crystals, such in-…
Enhanced Photovoltaic Performances of Graphene/Si Solar Cells by Insertion of an MoS2 Thin Film
Yuka Tsuboi, Feijiu Wang, Daichi Kozawa +5
Atomically thin layered materials such as graphene and transition-metal dichalcogenides exhibit great potential as active materials in optoelectronic devices because of their high…
Nonlinear Photoluminescence in Atomically Thin Layered WSe2 Arising from Diffusion-Assisted Exciton-Exciton Annihilation
Shinichiro Mouri, Yuhei Miyauchi, Minglin Toh +3
We studied multi-exciton dynamics in monolayer WSe2 using nonlinear photoluminescence (PL) spectroscopy and Monte Carlo simulations. We observed strong nonlinear saturation behavio…
Photocarrier relaxation in two-dimensional semiconductors
Daichi Kozawa, Rajeev Kumar, Alexandra Carvalho +8
Two-dimensional (2D) crystals of semiconducting transition metal dichalcogenides (TMD) absorb a large fraction of incident photons in the visible frequencies despite being atomical…
Nonlinear Photoluminescence Properties of Trions in Hole-doped Single-walled Carbon Nanotubes
Naoto Akizuki, Munechiyo Iwamura, Shinichiro Mouri +7
We studied the excitation density dependence of photoluminescence (PL) spectra of excitons and trions (charged excitons) in hole-doped single-walled carbon nanotubes. We found that…
Damage threshold and focusability of mid-infrared free-electron laser pulses gated by a plasma mirror with nanosecond switching pulses
Xiaolong Wang, Takashi Nakajima, Heishun Zen +2
The presence of a pulse train structure of an oscillator-type free-electron laser (FEL) results in the immediate damage of a solid target upon focusing. We demonstrate that the las…
Tunable electronic correlation effects in nanotube-light interactions
Yuhei Miyauchi, Zhengyi Zhang, Mitsuhide Takekoshi +9
Electronic many-body correlation effects in one-dimensional (1D) systems such as carbon nanotubes have been predicted to modify strongly the nature of photoexcited states. Here we…
Tunable Photoluminescence of Monolayer MoS2 via Chemical Doping
Shinichiro Mouri, Yuhei Miyauchi, Kazunari Matsuda
We demonstrate the tunability of the photoluminescence (PL) properties of monolayer (1L)-MoS2 via chemical doping. The PL intensity of 1L-MoS2 was drastically enhanced by the adsor…
All-angle collimation of incident light in -near-zero metamaterials
Vladimir Yu. Fedorov, Takashi Nakajima
We use the theory of inhomogeneous waves to study the transmission of light in -near-zero metamaterials. We find the effect of all-angle collimation of incident light, which mea…
Negative refraction of inhomogeneous waves in lossy isotropic media
Vladimir Yu. Fedorov, Takashi Nakajima
We theoretically study negative refraction of inhomogeneous waves at the interface of lossy isotropic media. We obtain explicit (up to the sign) expressions for the parameters of a…
Single-shot spectra of temporally selected micropulses from a mid-infrared free-electron laser by upconversion
Xiaolong Wang, Takashi Nakajima, Heishun Zen +2
We demonstrate the measurement of single-shot spectra of temporally selected micropulses from a mid-infrared (MIR) free-electron laser (FEL) by upconversion. We achieve the upconve…
Simultaneous measurement of the photodisintegration of 4He in the giant dipole resonance region
T. Shima, S. Naito, Y. Nagai +6
We have performed for the first time the simultaneous measurement of the two-body and three-body photodisintegration cross-sections of 4He in the energy range from 21.8 to 29.8 MeV…
Photo-disintegration cross section measurements on W, Re and Os: Implications for the Re-Os cosmochronology
T. Shizuma, H. Utsunomiya, P. Mohr +11
Cross sections of the W, Re, Os() reactions were measured using quasi-monochromatic photon beams from laser Compton scattering (LCS) with average energ…
Study of Field-Induced Magnetic Order in Singlet-Ground-State Magnet CsFeCl
Mitsuru Toda, Yutaka Fujii, Shinji Kawano +10
The field-induced magnetic order in the singlet-ground-state system CsFeCl has been studied by measuring magnetization and neutron diffraction. The field dependence of intensit…
Breakdown of the Mott insulator: Exact solution of an asymmetric Hubbard model
T. Fukui, N. Kawakami
The breakdown of the Mott insulator is studied when the dissipative tunneling into the environment is introduced to the system. By exactly solving the one-dimensional asymmetric Hu…
Spectral flow of non-hermitian Heisenberg spin chain with complex twist
T. Fukui, N. Kawakami
We investigate the spectral flow of the integrable non-hermitian Heisenberg spin chain under boundary conditions with complex twist angle. It is shown that the period of the spectr…
Mixed-Spin Ladders and Plaquette Spin Chains
A. Koga, S. Kumada, N. Kawakami +1
We investigate low-energy properties of a generalized spin ladder model with both of the spin alternation and the bond alternation, which allows us to systematically study not only…
Thermodynamic Properties of Heisenberg Ferrimagnetic Spin Chains: Ferromagnetic-Antiferromagnetic Crossover
Shoji Yamamoto, Takahiro Fukui
We study thermodynamic properties of the one-dimensional Heisenberg ferrimagnet with antiferromagnetically exchange-coupled two kinds of spins 1 and 1/2. The specific heat and the…
Alternating-Spin Ladders
T. Fukui, N. Kawakami
We investigate a two-leg spin ladder system composed of alternating-spin chains with two-different kind of spins. The fixed point properties are discussed by using spin-wave analys…
Alternating spin chains with singlet ground states
T. Fukui, N. Kawakami
We investigate low-energy properties of the alternating spin chain model composed of spin and with a singlet ground state. After examining the spin-wave spectrum in det…