Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo

2019-03 H.Okamoto was selected as an outstanding referee of 2019 for the Physical Review and Physical Review Letters journals published by American Physical Society (APS).
2019-03 T.Kitao won the Excellent Student Award of the field 7 of the Physical Society of Japan.
2019-03 T.Morimoto won the docter's thesis prise in the graduate school of frontier science.
2019-03 T.Morimoto won the"MERIT Award" in recognition of excellent achievement in the MERIT program.
2019-02　M.Mizui won S. Tanaka prize (master's thesis prize).
2018-09　Research result（Nature Communications (2018)) was issued a joint press release of The University of Tokyo, Tohoku University and JST.
2018-09　K.Asada won the Excellent Student Award of the field 7 of the Physical Society of Japan.
2018-03　N.Sono won the master's thesis prise in the department of advanced materials science and S. Tanaka prize (master's thesis prize).
2018-03　H.Yamakawa won the docter's thesis prise in the graduate school of frontier science.
2017-09　H.Yamakawa won the Excellent Student Award of the field 7 of the Physical Society of Japan.
2017-08　Reaserch result （Nature Materials (2017)) was issured a join press release of The University of Tokyo, Institute for Molecular Science and JST.
2017-06　T.Morimoto won the BEST POSTER AWARD in 6th international conferences on photoinduced phase transitions (PIPT6).
2017-03　Reaserch result (Phys. Rev. Lett. 118, 107404(2017)) was issured a joint press release of JST and KEK.
2017-03　T.Terashige won the"MERIT Award" in recognition of excellent achievement in the MERIT program.
2017-03　T.Morimoto was selected as focus of Physics by The American Physical Society. "Terahertz-Field-Induced Large Macroscopic Polarization and Domain-Wall Dynamics in an Organic Molecular Dielectric".
2016-10　"Time-resolved optical measurements and non-perturbative theoretical analyses of photo-and electric-field-responses in correlated electron systems" (Research Director Hiroshi Okamoto) of Research Project of Strategic Basic Research Programs(CREST) started .
2016-09　Reserch Project of AIST-UTokyo Adovanced Operando-Measurement Technology Open Innovation Laboratory(OPERANDO-OIL) started.
2016-03　T. Morimoto won the master's thesis prise in the department of advanced materials science and S. Tanaka prize (master's thesis prize). 2015-03　Y. Kinoshita won the master's thesis prise in the department of advanced materials science.
2014-12　N. Kida was selected as an outstanding referee of 2015 for the Physical Review and Physical Review Letters journals published by American Physical Society (APS).
2014-03　T. Terashige got special poster prize in ECRYS 2014.
2014-03　T. Terashige won S. Tanaka prize (master's thesis prize).
2013-03　N. Kida won the Young Scientist Award of the Physical Society of Japan.
2013-03　M. Soutome won the master's thesis prise in the department of advanced materials science and S. Tanaka prize (master's thesis prize).
2013-03　Y. Kinoshita won the bachelor's thesis prize in the department of applied physics.
2012-03　H. Uemura won the docter's thesis prise in the graduate school of frontier science.
2012-03　R. Takeda won the bachelor's thesis prize in the department of applied physics.
2011-03　H. Matsui won the docter's thesis prise in the graduate school of frontier science.
2011-03　T. Hamamoto won the master's thesis prise in the department of advanced materials science.
2011-03　M. Soutome won the bachelor's thesis prize in the department of applied physics 2010-05　Dr. Noriaki Kida joined our group as a new Associate Professor
2009-03　H.Uemura won the master's thesis prise in the department of advanced materials science and S. Tanaka prize (master's thesis prize).
2008-11　The paper of the Okamoto laboratory was selected as the Papers of Editors' Choice by JPSJ Editorial Board. "Ultrafast Charge Dynamics in One-Dimensional Organic Mott Insulators"
2008-03　K. Kimura won the master's thesis prise in the department of advanced materials science and　S. Tanaka prize (master's thesis prize).
2008-02　Prof. H. Okamoto won the 24th Inoue Prize for Science.
2007-03　S. Tao won the S. Tanaka prize (master's thesis prize).
2006-12　The paper of the Okamoto laboratory was selected as the Papers of Editors' Choice by JPSJ Editorial Board. "Ultrafast Photoconversion from Charge Density Wave State to Mott-Hubbard State in One-Dimensional Extended Peierls-Hubbard System of Br-Bridged Pd Compound"
2006-08　The paper of the Okamoto laboratory was selected as the Papers of Editors' Choice by JPSJ Editorial Board. "Photoinduced Dynamics of Sublattice Magnetization in Ferrimagnets:FeCr2S4and CoCr2S4" 2006-07　The research on the carbon nanotube of the Okamoto laboratory was taken up by the high technology column of Nikkan Kogyo Shimbun.

2018-10　In hydrogen-bonded organic ferroelectric, croconic acid, we achieved the ultrafast polarization control by terahertz electric fields via π-electron wavefunction changes.
T. Miyamoto et al.,Sci. Rep. 8, 15014:1-8 (2018)

2018-10　Using a seven femtosecond pump-probe reflection spectroscopy, we successfully detected the ultrafast spin dynamics in a one-dimensional Mott insulator of a cuprate.
T. Miyamoto et al., Nature Communications 9, 3948:1-7 (2018)

2018-09　A review paper focused on the control of electronic states by a terahertz electric-field pulse in organic correlated electron materials is published.
T. Miyamoto, H. Yamakawa, T. Morimoto, and H.Okamoto, J. Phys. B: At. Mol. Opt. Phys 51, 162001:1-32(2018)

2017-11　By the down-conversion of a femtosecond pulse obtained from the standard Ti:sapphire regenerative amplifier, we generated a carrier-envelope-phase-stable femtosecond pulse in the mid-infrared region.
T. Morimoto, N. Sono, et al., APEX 10, 122701 (2017)

2017-08　By the irradiation of an intense terahertz electric-field pulse on a Mott insulator of an organic material, we successfully observed the ultrafast transition from a Mott insulator to a metal.
H. Yamakawa, T. Miyamoto, et al., Nature Materials 16,1100-1105 (2017)

2017-03　We realized the control of the ultrafast photoinduced electric-polarization in a hydrogen-bonded organic ferroelectric, croconic acid.
K. Iwano, T. Miyamoto, et al., Phys. Rev. Lett. 118, 107404:1-5 (2017))

2017-03　By the irradiation of an intense terahertz electric-field pulse on a paraelectric organic crystal, we successfully realized the ultrafast paraelectric-to-ferroelectric transition.
T. Morimoto et al., Phys. Rev. Lett. 118, 107602 (2017)

2016-07　By using optical-pump terahertz-probe spectroscopy, we found that the photocarrier scattering rate in a photo-catalyst semiconductor, anatase TiO₂, depends on the frequency. We clarified that the origin of this frequency-dependence is attributed to scatterings of photocarriers by phonons associated with Ti-O stretching modes.
Y. Matsui, T. Terashige, et al., Phys. Rev. B 94, 041113(R):1-5 (2016)

2016-06　We observed the terahertz radiation in a ferrimagnetic insulating oxide LiFe₅O₈ originating from the light-induced subpicosecond magnetization modulation upon irradiation of a femtosecond laser pulse at room temperature and developed the new method of visualizing magnetic domains using the terahertz radiation.
Y. Kinoshita et al., ACS Photonics 3,1170-1175 (2016)

2016-02　In perovskite manganites, Pr_0.6Ca_0.4MnO₃, we succeeded in enhancing the photoinduced melting of the charge order via the weakening of the anisotropy by an irradiation of a pre-pump pulse. H. Yada et al., Phys. Rev. Lett. 116, 076402:1-5 (2016)

2016-02　We determined the ferroelectric-polarization direction and the origin of the ferroelectricity in the charge-ordered organic molecular crystal, α-(ET)₂I₃, by using terahertz electric-field pulses. H. Yamakawa et al., Sci. Rep. 6, 20571:1-10 (2016)

2015-06　By applying optical-pump terahertz-probe spectroscopy on the typical semiconductor silicon, we quantitatively evaluated the photocarrier scattering rate because of electron-hole interaction for the first time. We also clarified the scattering mechanism.
T. Terashige et al., Phys. Rev. B 91, 241201(R):1-5 (2015)

2015-02　Using a femtosecond pump-probe spectroscopy, we revealed that a one-dimensional Mott insulator of a cuprate shows an ultrafast photoinduced metallization and that photocarriers are rapidly localized via lattice relaxation processes.
H. Matsuzaki et al., Phys. Rev. B 91, 081114(R):1-5 (2015)

2014-10　Using an optical-pump broadband-terahertz-probe spectroscopy, we revealed that photocarriers in an organic semiconductor, rubrene, show a Drude response and are subjected to back-scatterings by molecular fluctuations.
H. Yada, R. Uchida, T. Terashige, et al., Appl. Phys. Lett. 105, 143302:1-5 (2014)

2014-07　In a room-temperature organic ferroelectric of conic acid, we found the efficient terahertz radiation by the irradiation of a femtosecond laser pulse. We developed a new method to visualize ferroelectric domains and domain walls using the terahertz radiation.
M. Sotome et al., Appl. Phys. Lett. 105, 041101:1-5 (2014)

2014-08　 Ultrafast photoinduced transitions of a one-dimensional Mott insulator into two distinct electronic phases, metal and charge-density-wave state, were realized in a bromine-bridged Pd-chain compound, by selecting the photon energy of a femtosecond excitation pulse.
H. Matsuzaki et al., Phys. Rev. Lett. 096403:1-6 (2014)

2013-10　By the irradiation of a femtosecond laser pulse, we succeeded in creating a transient ferroelectric domain in a quantum paraelectric phase of an organic charge-transfer compound.
T. Miyamoto et al., Phys. Rev. Lett. 111, 187801:1-5 (2013)

2013-10　Using a terahertz electric-field pulse, we achieved the ultrafast modulation of polarization amplitude in an electronic-type ferroelectric of an organic charge-transfer compound. T. Miyamoto et al., Nature Commun. 4, 2586:1-9 (2013)

2013-04　We quantitatively evaluated the second-order nonlinear susceptibility in a room-temperature organic ferroelectric of croconic acid and clarified its origin.
R. Sawada et al., Appl. Phys. Lett.102, 162901:1-4(2013)

2013-03　We revealed that a typical layered cuprate, La_2−xSr_xCuO₄, shows characteristic Fermi-level shifts with carrier doping by using hetero-epitaxial junctions of La_2−xSr_xCuO₄ with Nb–doped SrTiO₃. B.-S. Li et al., Appl. Phys. Lett. 102, 111606:1-4(2013)

2013-03　We demonstrated the band-transport mechanism of carriers in rubrene single-crystal field-effect transistors by using charge modulation infrared spectroscopy.
R. Uchida et al., Appl. Phys. Lett.102, 093301:1-5 (2013)

2013-03　In a one-dimensional Mott insulator of a bromine-bridged nickel-chain compound, ultrafast optical switching originating from large third-order optical nonlinearity was realized using a terahertz electric-field pulse.
H. Yada, T. Miyamoto et al., Appl. Phys. Lett.102, 091104:1-4 (2013)