
Original Papers
Recent Publications (Last Updated: 2017.12.07)
"Higgs mode in the dwave 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, Ryo Shimano,
arXiv:1711.04923.
"Rate Equation Analysis of the Dynamics of Firstorder Exciton Mott Transition"
F. Sekiguchi and R. Shimano,
J. Phys. Soc. Jpn. 86, 103702 (2017).
"Polarizationresolved terahertz thirdharmonic generation in a singlecrystal 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 swave superconductors"
R. Matsnaga and R. Shimano,
Phys. Scr. 92, 024003 (2017).
"Excitonic correlation in the Mott crossover regime in Ge"
F. Sekiguchi and R. Shimano,
Phys. Rev. B 91, 155202 (2015).
"Lightinduced 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 Timedomain Spectroscopy with High Spectral Resolution"
J. Y. Yoo and R. Shimano,
J. Infrared Milli. Terahz. Waves 35, 110 (2014).
"Higgs Amplitude Mode in the BCS Superconductors Nb_{1x}Ti_{x}N 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).
"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 PulseInduced 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).
"Magnetically driven ferroelectric atomic displacements in orthorhombic YMnO_{3}"
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 SrRuO_{3}"
R. Shimano, Y. Ikebe, K. S. Takahashi, M. Kawasaki, N. Nagaosa, and Y.Tokura,
EPL 95, 17002 (2011).
Selected for inclusion in the EPL Best of 2011 collection.
"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, T. Suzuki,
Physica Status Solidi (c) (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)..
"Optical investigation of the collective dynamics of chargeorbital 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�fs 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 electrooptic 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 photoinduced insulatortometal transition in the spin density wave system of
(TMTSF)_{2}PF_{6}"
S. Watanabe, R. Kondo, S. Kagoshima, and R. Shimano,
Physica B 405, S360S362 (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).
"Aboveroomtemperature ferroelectricity in a singlecomponent molecular crystal"
S. Horiuchi, Y. Tokunaga, G. Giovannetti, S. Picozzi, H. Itoh, R.
Shimano, R. Kumai,
and Y. Tokura,
NATURE 463, 789792 (2010).
"Chargeorderinginduced polar domains and domain walls in a bilayered manganite
Pr(Sr_{0.15}Ca_{0.85})_{2}Mn_{2}O_{7}"
H. Itoh, Y. Tokunaga, N. Kida, R. Shimano, and Y. Tokura,
Appl. Phys. Lett. 96, 032902 (2010).
"Observation of ultrafast photoinduced closing and recovery of the spindensitywave gap in (TMTSF)_{2}PF_{6}"
S. Watanabe, R. Kondo, S. Kagoshima, and R. Shimano,
Phys. Rev. B 80, 220408(R) (2009). (Editor�fs suggestion)
(selected for the January 2010 issue of Virtual Journal of Ultrafast Science,Volume
9, Issue1 (2010).)
"Electricdipoleactive magnetic resonance in the conicalspin magnet Ba_{2}Mg_{2}Fe_{12}O_{12}"
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 bcspiral spinordered states of perovskite manganites"
J. S. Lee, N. Kida, Y. Yamasaki, R. Shimano, and Y. Tokura,
Phys. Rev. B 80, 134409 (2009).
"Anisotropic polarization pimolecular skeleton coupled dynamics in protondisplacive organic ferroelectrics"
J. Fujioka, S. Horiuchi, N. Kida, R. Shimano, and Y. Tokura,
Phys. Rev. B 80(12), 125134 (2009).
"Timeresolved formation of excitons and electronhole droplets in Si studied using terahertz spectroscopy"
T. Suzuki and R. Shimano,
Phys. Rev. Lett. 103, 057401 (2009).
"Farinfrared optical study of electromagnons and their coupling to optical phonons in
Eu_{1x}Y_{x}MnO_{3} (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(21), 214431 (2009). (Editor�fs 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 spinordered states of RMnO_{3}"
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).
"Spindensitywave gap in (TMTSF)_{2}PF_{6} probed by reflectiontype 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, R. Shimano,
Appl. Phys. Lett. 92(1), 01211113 (2008).
"Evidence for an electric dipole active continuum band of spin excitations in multiferroic TbMnO_{3}",
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 DyMnO_{3}",
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)
"Dielectric properties of singlewalled carbon nanotubes in the terahertz frequency range", H. Nishimura, N. Minami, R. Shimano,
Appl. Phys.
Lett. 91(1), 01110813 (2007).
"Compact terahertz time domain spectroscopy system with diffractionlimited spatial resolution", S. Watanabe, R. Shimano,
Rev. Sci. Instr.
78(10), 10390616 (2007).
"Frequency tunable circular polarization control of terahertz radiation", R. Shimano, H. Nishimura, T. Sato,
Jpn. J. Appl. Phys. 44 (21), L676L678 (2005).
"Study of orthoexcitontoparaexciton conversion in Cu_{2}O by excitonic Lyman spectroscopy",
M. Kubouchi, K. Yoshioka, R. Shimano, A. Mysyrowicz, and M. KuwataGonokami,
Phys. Rev. Lett. 94, 01640314 (2005).
"Optical activity in chiral gold nanorings",
K. Jefimovs, N. Saito, Y. Ino, T. Vallius, P. Vahimaa, J. Turunen, R. Shimano, M. Kauranen,
Y. Svirko, M. KuwataGonokami,
Microelectronic Engineering, 7879, 448451 (2005).
before 2004
