Publications 論文

Updated: 2019.11.08


2019

  • "Light-driven electron-hole Bardeen-Cooper-Schrieffer-like state in bulk GaAs"
    Yuta Murotani, Changsu Kim, Hidefumi Akiyama, Loren N. Pfeiffer, Ken W. West, and Ryo Shimano
    Phys. Rev. Lett. 123, 197401 (2019). Editor's Suggestion
  • "Superconducting fluctuation probed by the Higgs mode in Bi2Sr2CaCu2O8+x thin films"
    Kota Katsumi, Zhi Zhong Li, Hélène Raffy, Yann Gallais, Ryo Shimano,
    arXiv:1910.07695.
  • "Higgs mode in Superconductors"
    Ryo Shimano and Naoto Tsuji,
    Annual Review of Condensed Matter Physics Volume 11, 2020 (in Advance first posted online).
  • "Light-induced nonequilibrium response of the superconducting cuprate La2−xSrxCuO4"
    Hiroaki Niwa, Naotaka Yoshikawa, Kaito Tomari, Ryusuke Matsunaga, Dongjoon Song, Hiroshi Eisaki, and Ryo Shimano,
    Phys. Rev. B 100, 104507 (2019). Editor's Suggestion
  • "Charge carrier dynamics of FeSe thin film investigated by terahertz magneto-optical spectroscopy"
    Naotaka Yoshikawa, Masayuki Takayama, Naoki Shikama, Tomoya Ishikawa, Fuyuki Nabeshima, Atsutaka Maeda, Ryo Shimano,
    Phys. Rev. B 100, 035110 (2019).
  • "Infrared Activation of the Higgs Mode by Supercurrent Injection in Superconducting NbN"
    Sachiko Nakamura, Yudai Iida, Yuta Murotani, Ryusuke Matsunaga, Hirotaka Terai, and Ryo Shimano,
    Phys. Rev. Lett. 122, 257001 (2019).
  • "Nonlinear optical response of collective modes in multiband superconductors assisted by nonmagnetic impurities"
    Yuta Murotani and Ryo Shimano,
    Phys. Rev. B 99, 224510 (2019).
  • "New collective mode in superconducting cuprates uncovered by Higgs spectroscopy"
    Hao Chu, Min-Jae Kim, Kota Katsumi, Sergey Kovalev, Robert David Dawson, Lukas Schwarz, Naotaka Yoshikawa, Gideok Kim, Daniel Putzky, Zhi Zhong Li, Hélène Raffy, Semyon Germanskiy, Jan-Christoph Deinert, Nilesh Awari, Igor Ilyakov, Bertram Green, Min Chen, Mohammed Bawatna, Georg Christiani, Gennady Logvenov, Yann Gallais, Alexander V. Boris, Bernhard Keimer, Andreas Schnyder, Dirk Manske, Michael Gensch, Zhe Wang, Ryo Shimano, Stefan Kaiser,
    arXiv:1901.06675.

2018

  • "Higgs mode in the d-wave superconductor Bi2Sr2CaCu2O8+x driven by an intense terahertz pulse"
    Kota Katsumi, Naoto Tsuji, Yuki I. Hamada, Ryusuke Matsunaga, John Schneeloch, Ruidan D. Zhong, Genda. D. Gu, Hideo Aoki, Yann Gallais, and Ryo Shimano,
    Phys. Rev. Lett. 120, 117001 (2018). Editor's Suggestion
  • "Ultrafast terahertz nonlinear optics of Landau level transitions in a monolayer graphene"
    Go Yumoto, Ryusuke Matsunaga, Hiroki Hibino, and Ryo Shimano,
    Phys. Rev. Lett. 120, 107401 (2018).
  • "Terahertz field-induced ionization and perturbed free induction decay of excitons in bulk GaAs"
    Yuta Murotani, Masayuki Takayama, Fumiya Sekiguchi, Changsu Kim, Hidefumi Akiyama, and Ryo Shimano,
    J. Phys. D: Appl. Phys. 51, 114001 (2018).

2017

  • "Rate Equation Analysis of the Dynamics of First-order Exciton Mott Transition"
    F. Sekiguchi and R. Shimano,
    J. Phys. Soc. Jpn. 86, 103702 (2017).
  • "Polarization-resolved terahertz third-harmonic generation in a single-crystal superconductor NbN: Dominance of the Higgs mode beyond the BCS approximation"
    R. Matsunaga, N. Tsuji, K. Makise, H. Terai, H. Aoki, and R. Shimano,
    Phys. Rev. B 96, 020505(R) (2017).
  • "Anomalous metal phase emergent on the verge of an exciton Mott transition"
    F. Sekiguchi, T. Mochizuki, C. Kim, H. Akiyama, L. N. Pfeiffer, K. W. West, and R. Shimano,
    Phys. Rev. Lett. 118, 067401 (2017).
  • "Nonlinear terahertz spectroscopy of Higgs mode in s-wave superconductors"
    R. Matsunaga and R. Shimano,
    Phys. Scr. 92, 024003 (2017).

2016


2015


2014

  • "Light-induced collective pseudospin precession resonating with Higgs mode in a superconductor"
    R. Matsunaga, N. Tsuji, H. Fujita, A. Sugioka, K. Makise, Y. Uzawa, H. Terai, Z. Wang, H. Aoki, and R. Shimano,
    Science 345, 1145 (2014).
  • "Lifetime Measurement of Excitons in Si by Terahertz Time-domain Spectroscopy with High Spectral Resolution"
    J. Y. Yoo and R. Shimano,
    J. Infrared Milli. Terahz. Waves 35, 110 (2014).

2013

  • "Higgs Amplitude Mode in the BCS Superconductors Nb1-xTixN induced by Terahertz Pulse Excitation"
    R. Matsunaga, Y. I. Hamada, K. Makise, Y. Uzawa, H. Terai, Z. Wang, and R. Shimano,
    Phys. Rev. Lett. 111, 057002 (2013).
  • "Quantum Faraday and Kerr rotations in graphene"
    R. Shimano, G. Yumoto, J. Y. Yoo, R. Matsunaga, S. Tanabe, H. Hibino, T. Morimoto, and H. Aoki,
    Nature Commun. 4, 1841 (2013).

2012

  • "Nonequilibrium BCS state dynamics induced by intense terahertz pulses in a superconducting NbN film"
    R. Matsunaga and R. Shimano,
    Phys. Rev. Lett. 109, 187002 (2012).
  • "Chirality of matter shows up via spin excitations"
    S. Bordacs, I. Kezsmarki, D. Szaller, L. Demko, N. Kida, H. Murakawa, Y. Onose, R. Shimano, T. Room, U. Nagel, S. Miyahara, N. Furukawa, and Y. Tokura,
    Nature Physics 8, 734 (2012).
  • "Exciton Mott transition in Si revealed by terahertz spectroscopy"
    T. Suzuki and R. Shimano,
    Phys. Rev. Lett. 109, 046402 (2012).
  • "Intense Terahertz Pulse-Induced Nonlinear Responses in Carbon Nanotubes"
    R. Shimano, S. Watanabe, and R. Matsunaga,
    J. Infrared Milli. Terahz. Waves 33, 861 (2012).
  • "Magnetoelectric resonance with electromagnons in a perovskite helimagnet"
    Y. Takahashi, R. Shimano, Y. Kaneko, H. Murakawa, and Y. Tokura,
    Nature Physics 8, 121 (2012).

2011

  • "Magnetically driven ferroelectric atomic displacements in orthorhombic YMnO3"
    D. Okuyama, S. Ishiwata, Y. Takahashi, K. Yamauchi, S. Picozzi, K. Sugimoto, H. Sakai, M. Takata, R. Shimano, Y. Taguchi, T. Arima, and Y. Tokura,
    Phys. Rev. B 84, 054440 (2011).
  • "Terahertz Faraday rotation induced by an anomalous Hall effect in the itinerant ferromagnet SrRuO3"
    R. Shimano, Y. Ikebe, K. S. Takahashi, M. Kawasaki, N. Nagaosa, and Y.Tokura,
    EPL 95, 17002 (2011).
  • "Cooling dynamics of photoexcited carriers in Si studied using optical pump and terahertz probe spectroscopy"
    T. Suzuki and R. Shimano,
    Phys. Rev. B 83, 085207 (2011).
  • "Exciton Mott transition in Si studied by terahertz spectroscopy"
    R. Shimano and T. Suzuki,
    Phys. Status Solidi (c) 8, 1153-1156 (2011).
  • "Intense terahertz pulse induced exciton generation in carbon nanotubes"
    S. Watanabe, N. Minami, and R. Shimano,
    Optics Express 19, 1528 (2011); ibid., 19, 15388 (2011).

2010

  • "Optical investigation of the collective dynamics of charge-orbital density waves in layered manganites"
    J. Fujioka, Y. Ida, Y. Takahashi, N. Kida, R. Shimano, and Y. Tokura,
    Phys. Rev. B 82, 140409(R) (2010). Editor's Suggestion
  • "Electromagnons in the spin collinear state of a triangular lattice antiferromagnet"
    S. Seki, N. Kida, S. Kumakura, R. Shimano, and Y. Tokura,
    Phys. Rev. Lett. 105, 097207 (2010).
  • "Room temperature terahertz electro-optic modulation by excitons in carbon nanotubes"
    T. Ogawa, S. Watanabe, N. Minami, and R. Shimano,
    Appl. Phys. Lett. 97, 041111 (2010).
    (selected for the August 2010 issue of Virtual Journal of Nanoscale Science & Technology, Volume 22, Issue 6 (2010),
    and Virtual Journal of Ultrafast Science, Volume 9, Issue 8 (2010).)
  • "Optical Hall effect in the integer quantum Hall regime"
    Y. Ikebe, T. Morimoto, R. Masutomi, T. Okamoto, H. Aoki, and R. Shimano,
    Phys. Rev. Lett. 104, 256802 (2010).
  • "Ultrafast photo-induced insulator-to-metal transition in the spin density wave system of (TMTSF)2PF6"
    S. Watanabe, R. Kondo, S. Kagoshima, and R. Shimano,
    Physica B 405, S360-S362 (2010).
  • "Electromagnons in the multiferroic state of perovskite manganites with symmetric exchange striction"
    Y. Takahashi, S. Ishiwata, S. Miyahara, Y. Kaneko, N. Furukawa, Y. Taguchi, R. Shimano, and Y. Tokura,
    Phys. Rev. B 81, 100413(R) (2010).
  • "Above-room-temperature ferroelectricity in a single-component molecular crystal"
    S. Horiuchi, Y. Tokunaga, G. Giovannetti, S. Picozzi, H. Itoh, R. Shimano, R. Kumai, and Y. Tokura,
    Nature 463, 789-792 (2010).
  • "Charge-ordering-induced polar domains and domain walls in a bilayered manganite Pr(Sr0.15Ca0.85)2Mn2O7"
    H. Itoh, Y. Tokunaga, N. Kida, R. Shimano, and Y. Tokura,
    Appl. Phys. Lett. 96, 032902 (2010).

2009

  • "Observation of ultrafast photoinduced closing and recovery of the spin-density-wave gap in (TMTSF)2PF6"
    S. Watanabe, R. Kondo, S. Kagoshima, and R. Shimano,
    Phys. Rev. B 80, 220408(R) (2009). Editor's Suggestion
    (selected for the January 2010 issue of Virtual Journal of Ultrafast Science,Volume 9, Issue1 (2010).)
  • "Electric-dipole-active magnetic resonance in the conical-spin magnet Ba2Mg2Fe12O12"
    N. Kida, D. Okuyama, S. Ishiwata, Y. Taguchi, R. Shimano, K. Iwasa, T. Arima, and Y. Tokura,
    Phys. Rev. B 80, 220406(R) (2009).
  • "Lattice dynamics in the ab- and bc-spiral spin-ordered states of perovskite manganites"
    J. S. Lee, N. Kida, Y. Yamasaki, R. Shimano, and Y. Tokura,
    Phys. Rev. B 80, 134409 (2009).
  • "Anisotropic polarization $\pi$-molecular skeleton coupled dynamics in proton-displacive organic ferroelectrics"
    J. Fujioka, S. Horiuchi, N. Kida, R. Shimano, and Y. Tokura,
    Phys. Rev. B 80, 125134 (2009).
  • "Time-resolved formation of excitons and electron-hole droplets in Si studied using terahertz spectroscopy"
    T. Suzuki and R. Shimano,
    Phys. Rev. Lett. 103, 057401 (2009).
  • "Far-infrared optical study of electromagnons and their coupling to optical phonons in Eu1−xYxMnO3 (x=0.1, 0.2, 0.3, 0.4, and 0.45)"
    Y. Takahashi, Y. Yamasaki, N. Kida, Y. Kaneko, T. Arima, R. Shimano, and Y. Tokura,
    Phys. Rev. B 79, 214431 (2009). Editor's Suggestion
  • "Vortex dynamics in a NbN film studied by terahertz spectroscopy"
    Y. Ikebe, R. Shimano, M. Ikeda, T. Fukumura, and M. Kawasaki,
    Phys. Rev. B 79, 174525 (2009).
    (Selected for Virtual Journal of Applications of Superconductivity, Volume 16, No.11, (2009).)
  • "Systematics of electromagnons in the spiral spin-ordered states of RMnO3"
    J. S. Lee, N. Kida, S. Miyahara, Y. Takahashi, Y. Yamasaki, R. Shimano, N. Furukawa, and Y. Tokura,
    Phys. Rev. B 79, 180403(R) (2009).

2008

  • "Spin-density-wave gap in (TMTSF)2PF6 probed by reflection-type terahertz time domain spectroscopy"
    S. Watanabe, R. Kondo, S. Kagoshima, and R. Shimano,
    Phys. Stat. Solidi (b) 245, 2688 (2008).
  • "Characterization of doped silicon in low carrier density region by terahertz frequency Faraday effect"
    Y. Ikebe and R. Shimano,
    Appl. Phys. Lett. 92, 012111 (2008).
  • "Evidence for an electric dipole active continuum band of spin excitations in multiferroic TbMnO3"
    Y. Takahashi, N. Kida, Y. Yamasaki, J. Fujioka, T. Arima, R. Shimano, S. Miyahara, M. Mochizuki, N. Furukawa, and Y. Tokura,
    Phys. Rev. Lett. 101, 187201 (2008).
  • "Electrically driven spin excitation in a ferroelectric magnet DyMnO3"
    N. Kida, Y. Ikebe, Y. Takahashi, J. P. He, Y. Kaneko, Y.Yamasaki, R. Shimano, T. Arima, N. Nagaosa and Y. Tokura,
    Phys. Rev. B 78, 104414 (2008). Editor's Suggestion

2007


2005


2004 and earlier

  • "Terahertz time domain magneto-optical ellipsometry in reflection geometry"
    Y. Ino, R. Shimano, Y. Svirko, and M. Kuwata-Gonokami,
    Phys. Rev. B 70, 155101 (2004).
  • "Numerical phase correction method for terahertz time-domain reflection spectroscopy"
    E. M. Vartiainen, Y. Ino, R. Shimano, M. Kuwata-Gonokami, Y. Svirko, and K. Peiponenn,
    J. Appl. Phys. 96, 4171 (2004).
  • "Time-resolved excitonic lyman spectroscopy of Cu2O"
    M. Kuwata-Gonokami, M. Kubouchi, R. Shimano, A. Mysyrowicz,
    J. Phys. Soc. Jpn. 73, 1065-1069 (2004).
  • "Observation of the spin-charge thermal isolation of ferromagnetic Ga0.94Mn0.06As by time-resolved magneto-optical measurement"
    E. Kojima, R.Shimano, Y. Hashimoto, S. Katsumoto, Y. Iye, and M. Kuwata-Gonokami,
    Phys. Rev. B 68, 193203 (2003).
  • "Creation of supercooled exciton gas and transformation to electron-hole droplets in diamond"
    M. Nagai, R. Shimano, K. Horiuchi, M. Kuwata-Gonokami,
    Phys. Rev. B 68, 081202(R) (2003).
  • "Phase diagram of the quantum degenerate electron-hole system in diamond"
    M. Nagai, R. Shimano, K. Horiuchi, M. Kuwata-Gonokami,
    Phys. Stat. Solidi (b) 238, 509-512 (2003).
  • "Efficient two-photon light amplification by a coherent biexciton wave"
    R. Shimano, Yu. P Svirko, A. Mysyrowicz, and M. Kuwata-Gonokami,
    Phys. Rev. Lett. 89, 233601 (2002).
  • "Terahertz frequency Hall measurement by magneto-optical Kerr spectroscopy in InAs"
    R. Shimano, Y. Ino, Yu. P. Svirko, M. Kuwata-Gonokami,
    Appl. Phys. Lett. 81, 199 (2002).
  • "Phase-coherent manipulation of cold biexcitonic waves"
    M. Kuwata-Gonokami, R. Shimano, and Andre Mysyrowicz,
    J. Phys. Soc. Jpn. 71, 1257-1260 (2002).
  • "Formation of a high T-c electron-hole liquid in diamond"
    R. Shimano, M. Nagai, K. Horiuch, M. Kuwata-Gonokami,
    Phys. Rev. Lett. 88, 057404 (2002).
  • "Electron-hole droplet formation in direct-gap semiconductors observed by mid-infrared pump-probe spectroscopy"
    M. Nagai, R. Shimano, M. Kuwata-Gonokami,
    Phys. Rev. Lett. 86, 5795 (2001).
  • "Gigantic reflectance anisotropy of the [110] face of cubic ZnSe in the excitonic part of the spectrum"
    G. Mohs, S. Dhanjal, T. Kise, M. Shirane, R. Shimano, Y. P. Svirko, K. Ohkawa, N.I. Zheludev, M. Kuwata-Gonokami,
    J. Phys. Soc. Jpn. 69, 3458 (2000).
  • "Quantitative study of exciton-exciton interaction in a GaAs microcavity"
    C, Ramkumar, T. Aoki, R. Shimano, Y. P. Svirko, T. Kise, T. Someya, H. Sakaki, and M. Kuwata-Gonokami,
    J. Phys. Soc. Jpn. 69, 2439 (2000).
  • "Role of exciton-exciton interaction on resonant third-order nonlinear optical responses"
    M. Kuwata-Gonokami, T. Aoki, C. Ramkumar, R. Shimano, Yu. P. Svirko,
    J. Luminescence. 87-89, 162-167 (2000).
  • "Coherent dynamics of excitons in an island-inserted GaAs/AlAs quantum well structure: suprression of phase relaxation and a deep quantum beat"
    T. Matsusue, H. Akiyama, T. Saiki, C. Ramkumar, M. Shirane, R. Shimano, M. Kuwata-Gonokami, and H. Sakaki,
    Jpn. J. Appl. Phys. 38, 2735 (1999).
  • "Degenerate four wave mixing measurements on an exciton-photon coupled system in a semiconductor microcavity"
    M. Shirane, C. Ramkumar, Y. P Svirko, H. Suzuura, S. Inouye, R. Shimano, T. Someya, H. Sakaki, M. Kuwata-Gonokami,
    Phys. Rev. B 58, 7978 (1998).
  • "Optical detection of crystallographic domains zinc-blende crystal"
    G. Mohs, R. Shimano, T. Kise, M. Shirane, M. Kuwata-Gonokami, K. Ohkawa, S. Dhanjal, Y. Svirko, N. Zheludev,
    Appl. Phys. Lett. 73, 1511 (1998).
  • "On the gain mechanism in GaN based laser diodes"
    G. Mohs, T. Aoki, R. Shimano, M. Kuwata-Gonokami, and S. Nakamura,
    Solid State Commun. 108, 105-109 (1998).
  • "Failure of the modal gain model in a GaN based laser diode"
    G. Mohs, T. Aoki, M. Nagai, R. Shimano, M. Kuwata-Gonokami, and S. Nakamura,
    Solid State Commun. 104, 643-648 (1997).
  • "Spherical cavity-mode laser with self-organized CuCl microspheres"
    M. Nagai, F. Hoshino, S. Yamamoto, R. Shimano, and M. Kuwata-Gonokami,
    Optics Lett. 22, 1630-1632 (1997).
  • "Parametric scattering of cavity polaritons"
    M. Kuwata-Gonokami, S. Inouye, H. Suzuura, M. Shirane, R. Shimano, T. Someya, and H. Sakaki,
    Phys. Rev. Lett. 79, 1341 (1997).
  • "Nonlinear optical processes of excitons in semiconductor microcavity structures"
    Ryo Shimano and Makoto Kuwata-Gonokami,
    Material Science & Engineering B 48, 59-65 (1997).
  • "Exciton-to biexciton transition in quasi-one-dimensional organics"
    S. Mazumdar, M. Kuwata-Gonokami, N. Peyghambarian, K. Meissner, B. Fluegel, Y. Sato, K. Ema, R. Shimano, F. Guo, T. Tokihiro, H. Ezaki, E. Hanamura,
    J. Chem. Phys. 104, 9292 (1996).
  • "Efficient phase conjugation wave generation from a GaAs single quantum well in microcavity"
    R. Shimano, S. Inouye, M. Kuwata-Gonokami, T. Nakamura, M. Yamanishi and I. Ogura,
    Jpn. J. Appl. Phys. 34, L817-L820 (1995).
  • "Observation of Autler-Townes splitting of biexcitons in CuCl"
    Ryo Shimano and Makoto Kuwata-Gonokami,
    Phys. Rev. Lett. 72, 530 (1994).
  • "Exciton strings in an organic charge-transfer crystal"
    M. Kuwata-Gonokami, N. Peyghambarian, K. Meissner, B. Fluegel, Y. Sato, K. Ema, R. Shimano, S. Mazumdar, F. Guo, T. Tokihiro, H. Ezaki, E. Hanamura,
    Nature 367, 47-48 (1994).
  • "Excitonic n-strings in linear chains"
    H. Ezaki, M. Kuwata-Gonokami, R. Shimano, K. Ema, E. Hanamura, B. Fluegel, K. Meissner, S. Mazumdar, N. Peyghambarian,
    Solid State Commun. 88, 211-216 (1993).
  • "Optical nonlinearities and dynamics of an exciton-biexciton system in CuCl in the weak excitation regime"
    M. Kuwata-Gonokami, R. Shimano, J. Iwamatsu, H. Akiyama, T. Kuga, and M. Matsuoka,
    Phys. Stat. Sol. 159, 347-351 (1990).