Search Results - "Takahashi, Youtarou"

Electric field control of natural optical activity in a multiferroic helimagnet by Masuda, Ryoji, Kaneko, Yoshio, Tokura, Yoshinori, Takahashi, Youtarou

“…Controlling the chiral degree of freedom in matter has long been an important issue for many fields of science. The spin-spiral order, which exhibits a strong…”
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Terahertz spectroscopy on Faraday and Kerr rotations in a quantum anomalous Hall state by Okada, Ken N., Takahashi, Youtarou, Mogi, Masataka, Yoshimi, Ryutaro, Tsukazaki, Atsushi, Takahashi, Kei S., Ogawa, Naoki, Kawasaki, Masashi, Tokura, Yoshinori

“…Electrodynamic responses from three-dimensional topological insulators are characterized by the universal magnetoelectric term constituent of the Lagrangian…”
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Topological magneto-optical effect from skyrmion lattice by Kato, Yoshihiro D., Okamura, Yoshihiro, Hirschberger, Max, Tokura, Yoshinori, Takahashi, Youtarou

“…The magnetic skyrmion is a spin-swirling topological object characterized by its nontrivial winding number, holding potential for next-generation spintronic…”
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Role of Spin-spiral Period for Anomalous Magnetic-Field-Induced Spectral Variation of Electromagnon Resonance in Multiferroic Ba2Mg2Fe12O22 by Shishikura, Hiroe, Ishiwata, Shintaro, Taguchi, Yasujiro, Tokura, Yoshinori, Takahashi, Youtarou

“…We investigate the spectral variation of electromagnon resonance in magnetic field, which causes the giant magnetochromism in terahertz region, in a…”
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Terahertz photon to dc current conversion via magnetic excitations of multiferroics by Ogino, Makiko, Okamura, Yoshihiro, Fujiwara, Kosuke, Morimoto, Takahiro, Nagaosa, Naoto, Kaneko, Yoshio, Tokura, Yoshinori, Takahashi, Youtarou

“…Direct conversion from terahertz photon to charge current is a key phenomenon for terahertz photonics. Quantum geometrical description of optical processes in…”
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Photovoltaic effect by soft phonon excitation by Okamura, Yoshihiro, Morimoto, Takahiro, Ogawa, Naoki, Kaneko, Yoshio, Guo, Guang-Yu, Nakamura, Masao, Kawasaki, Masashi, Nagaosa, Naoto, Tokura, Yoshinori, Takahashi, Youtarou

“…SignificanceThe quantum-mechanical geometric phase of electrons provides various phenomena such as the dissipationless photocurrent generation through the…”
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Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region by Guo, Zijing, Sato, Tetsu, Han, Yang, Takamura, Naoki, Ikeda, Ryohei, Miyamoto, Tatsuya, Kida, Noriaki, Ogino, Makiko, Takahashi, Youtarou, Kasuya, Naotaka, Watanabe, Shun, Takeya, Jun, Wei, Qingshuo, Mukaida, Masakazu, Okamoto, Hiroshi

“…Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a prototypical conducting polymer. When a polar solvent is used during film…”
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Optical anomalous Hall effect enhanced by flat bands in ferromagnetic van der Waals semimetal by Kato, Yoshihiro D., Okamura, Yoshihiro, Minami, Susumu, Fujimura, Reika, Mogi, Masataka, Yoshimi, Ryutaro, Tsukazaki, Atsushi, Takahashi, Kei S., Kawasaki, Masashi, Arita, Ryotaro, Tokura, Yoshinori, Takahashi, Youtarou

“…Geometrical aspects of electronic states in condensed matter have led to the experimental realization of enhanced electromagnetic phenomena, as exemplified by…”
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Relaxation processes from charge-transfer excited states of organic radical 1,3,5-trithia- 2,4,6-triazapentalenyl crystals studied by ultrafast luminescence spectroscopy by Takahashi, Youtarou, Suemoto, Tohru, Oguri, Seiji, Takeda, Jun

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Wavepacket dynamics at low temperature in localized excitons of the quasi-one-dimensional Br-bridged Pt complex studied by femtosecond luminescence spectroscopy by YASUKAWA, Keizo, TAKAHASHI, Youtarou, SUEMOTO, Tohru, KURITA, Susumu

“…We report on the femtosecond time-resolved luminescence spectroscopy in a quasi-one-dimensional halogen-bridged mixed valence platinum complex,…”
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Wavepacket Motion in Self-Trapped Exciton of Quasi-One-Dimensional Halogen-Bridged Pt Complex, [Pt(en)2][Pt(en)2I2] (CIO4)4, Observed by Femtosecond Time Resolved Luminescence Spectroscopy by YASUKAWA, Keizo, TAKAHASHI, Youtarou, KURITA, Susumu, SUEMOTO, Tohru

“…We report on the time-resolved luminescence spectroscopy of a quasi-one-dimensional halogen-bridged platinum complex, [Pt(en)2][Pt(en)2I2] (ClO4)4, at room…”
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Magnetoelectric resonance with electromagnons in a perovskite helimagnet by Takahashi, Youtarou, Shimano, Ryo, Kaneko, Yoshio, Murakawa, Hiroshi, Tokura, Yoshinori

“…Electromagnons are excitations that exhibit both electric and magnetic dipole moments, and are expected to enhance the coupling of magnetization and…”
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Real-time observation on femtosecond depolarization of room-temperature luminescence in KI F centers by KOYAMA, Takeshi, TAKAHASHI, Youtarou, NAKAJIMA, Makoto, SUEMOTO, Tohru

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Ultrafast dynamical study of self-trapped excitons in ladder type of halogen-bridged Pt complexes by Suemoto, Tohru, Takahashi, Youtarou, Yasukawa, Keizo, Kawakami, Daisuke, Takaishi, Shinya, Yamashita, Masahiro, Kobayashi, Atsushi, Kitagawa, Hiroshi

“…The properties and the dynamics of the excited states in out-of-phase ladder-type halogen-bridged Pt complexes (Pt–Br-out and Pt–I-out) are studied using…”
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Role of Spin-spiral Period for Anomalous Magnetic-Field-Induced Spectral Variation of Electromagnon Resonance in Multiferroic Ba 2 Mg 2 Fe 12 O 22 by Shishikura, Hiroe, Ishiwata, Shintaro, Taguchi, Yasujiro, Tokura, Yoshinori, Takahashi, Youtarou

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Large nonlinear optical magnetoelectric response in a noncentrosymmetric magnetic Weyl semimetal by Shoriki, Kentaro, Moriishi, Keigo, Okamura, Yoshihiro, Yokoi, Kohei, Usui, Hidetomo, Murakawa, Hiroshi, Sakai, Hideaki, Hanasaki, Noriaki, Tokura, Yoshinori, Takahashi, Youtarou

“…Weyl semimetals resulting from either inversion ( ) or time-reversal ( ) symmetry breaking have been revealed to show the record-breaking large optical…”
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Splitting dynamics of nuclear wave packets in a Peierls insulator using femtosecond laser spectroscopy by Takahashi, Youtarou, Yasukawa, Keizo, Kurita, Susumu, Suemoto, Tohru

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Propagation of a ballistic nuclear wavepacket on an adiabatic potential surface of a one-dimensional Br-bridged Pd complex without a self-trapped exciton state by Takahashi, Youtarou, Kitagawa, Hiroshi, Suemoto, Tohru

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Excited-state dynamics of TTTA studied by femtosecond luminescence spectroscopy by Takahashi, Youtarou, Suemoto, Tohru, Oguri, Seiji, Takeda, Jun

“…The excited-state dynamics in photoinduced phase transition material, 1,3,5-trithia-2,4,6-triazapentalenyl (TTTA), was investigated by using femtosecond…”
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Wave-packet oscillation in the excited state of KBr F centers by Koyama, Takeshi, Takahashi, Youtarou, Nakajima, Makoto, Suemoto, Tohru

“…We investigated wave-packet oscillation of KBr F centers at 5 K using up-conversion spectroscopy method. The Fourier power spectrum of the oscillatory signal…”
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