79 citations · 189 across the 11 of their papers we have counts for
11 papers
Composition-dependent ultrafast luminescence in Cu-Ni alloys: Combined experimental and ab initio study
Tohru Suemoto, Haruki Morino, Shota Ono +5
Properties of Cu-Ni solid solutions have long been studied in physical and materials sciences. Yet, their many-body properties have not been well understood. Here, we investigate u…
Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser
Kaishu Kawaguchi, Kenta Kuroda, Z. Zhao +12
We describe a setup of time-, spin-, and angle-resolved photoemission spectroscopy (tr-SARPES) employing a 10.7-eV (=115.6 nm) pulse laser at 1-MHz repetition rate as a probe ph…
Spin-polarized saddle points in the topological surface states of the elemental Bismuth revealed by a pump-probe spin-resolved ARPES
Yuto Fukushima, Kaishu Kawaguchi, Kenta Kuroda +11
We use a pump-probe, spin-, and angle-resolved photoemission spectroscopy (ARPES) with a 10.7 eV laser accessible up to the Brillouin zone edge, and reveal for the first time the e…
Mechanism of femtosecond laser ablation revealed by THz emission spectroscopy
Shuntaro Tani, Yohei Kobayashi
We investigated femtosecond laser ablation dynamics using THz time-domain spectroscopy. To clarify the breakdown dynamics of materials, we focused on the motion of charged particle…
Neural-network-assisted in situ processing monitoring by speckle pattern observation
Shuntaro Tani, Yutsuki Aoyagi, Yohei Kobayashi
We propose a method to monitor the progress of laser processing using laser speckle patterns. Laser grooving and percussion drilling were performed using femtosecond laser pulses.…
Coherent control of acoustic phonons in a silica fiber using a multi-GHz optical frequency comb
Mamoru Endo, Shota Kimura, Shuntaro Tani +1
Multi-gigahertz mechanical vibrations stemming from interactions between light fields and matter, also known as acoustic phonons, have long been a subject of study. In recent years…
Selective excitation of multipolar spoof plasmons using orbital angular momentum of light
Takashi Arikawa, Tomoki Hiraoka, Shohei Morimoto +7
The nature of light-matter interaction is governed by the spatial-temporal structures of a light field and material wavefunctions. The emergence of the light beam with transverse p…
100 MHz high-speed strain monitor using fiber Bragg grating and optical filter applied for magnetostriction measurements of cobaltite at magnetic fields beyond 100 T
Akihiko Ikeda, Toshihiro Nomura, Yasuhiro H. Matsuda +4
High-speed 100 MHz strain monitor using fiber Bragg grating (FBG) and an optical filter has been devised for the magnetostriction measurements under ultrahigh magnetic fields. The…
High-speed 100 MHz strain monitor using fiber Bragg grating and optical filter for magnetostriction measurements under ultrahigh magnetic fields
Akihiko Ikeda, Toshihiro Nomura, Yasuhiro H. Matsuda +4
A high-speed 100 MHz strain monitor using a fiber Bragg grating, an optical filter, and a mode-locked optical fiber laser has been devised, which has a resolution of $ΔL/L\sim10^{-…
High repetition pump-and-probe photoemission spectroscopy based on a compact fiber laser system
Y. Ishida, T. Otsu, A. Ozawa +4
The paper describes a time-resolved photoemission (TRPES) apparatus equipped with a Yb-doped fiber laser system delivering 1.2-eV pump and 5.9-eV probe pulses at the repetition rat…
Terahertz radiation induced ballistic electron transport in graphene
Shuntaro Tani, François Blanchard, Koichiro Tanaka
We investigated ultrafast carrier dynamics in graphene with near-infrared transient absorption measurement after intense half-cycle terahertz pulse excitation. The terahertz electr…