139 citations · 247 across the 7 of their papers we have counts for
7 papers
Coherent driving of displacive Higgs fluctuations in superconductors
Jacopo Fiore, Irene Zanotti, Kota Katsumi +4
Intense phase-stable terahertz (THz) laser pulses can drive collective modes coherently via multi-photon excitation pathways in a manner different than the standard resonant mechan…
Revealing novel aspects of light-matter coupling in terahertz two-dimensional coherent spectroscopy: the case of the amplitude mode in superconductors
Kota Katsumi, Jacopo Fiore, Mattia Udina +7
Recently developed terahertz (THz) two-dimensional coherent spectroscopy (2DCS) is a powerful technique to obtain materials information in a fashion qualitatively different from ot…
Light-induced coherent interlayer transport in stripe-ordered
Morihiko Nishida, Kota Katsumi, Dongjoon Song +2
We have investigated the photoexcited transient responses of stripe-ordered phase in a cuprate superconductor, …
Disentangling lattice and electronic instabilities in the excitonic insulator candidate TaNiSe by nonequilibrium spectroscopy
Kota Katsumi, Alexandr Alekhin, Sofia-Michaela Souliou +7
TaNiSe is an excitonic insulator candidate showing the semiconductor/semimetal-to-insulator (SI) transition below = 326 K. However, since a structural transi…
Near-infrared light-induced superconducting-like state in underdoped YBaCuO studied by -axis terahertz third-harmonic generation
Kota Katsumi, Morihiko Nishida, Stefan Kaiser +3
Recent observation of the light-induced superconducting (SC)-like transient response in the -axis optical conductivity far above the SC transition temperature i…
Terahertz pulse-driven collective mode in the nematic superconducting state of BaKFeAs
Romain Grasset, Kota Katsumi, Pierre Massat +4
We investigate the iron-based superconductor BaKFeAs using intense terahertz (THz) light. In the superconducting state a THz Kerr signal is observed and assigne…
Higgs mode in the d-wave superconductor Bi2Sr2CaCu2O8+x driven by an intense terahertz pulse
Kota Katsumi, Naoto Tsuji, Yuki I. Hamada +7
We investigated the terahertz (THz)-pulse driven nonlinear response in the d-wave cuprate superconductor Bi2Sr2CaCu2O8+x (Bi2212) using a THz pump near-infrared probe scheme in the…