Okamoto Hiroshi

オカモトヒロシ | Okamoto Hiroshi

Affiliation and department：
Job title： Associate Professor
Homepage URL (1)： http://pete.k.u-tokyo.ac.jp/

Research field (1)： Semiconductors, optical and atomic physics

Research keywords (1)：超短パルスレーザー分光、光誘起相転移、非線形光学、テラヘルツ分光

Research theme for competitive and other funds (29)：

2021 - 2026 Explorations of ultrafast quantum phase transitions in strongly correlated electron systems by high-intensity terahertz/mid-infrared pulses
2021 - 2022 高強度テラヘルツ・中赤外パルスによる強相関系の超高速電子状態制御と量子相転移
2018 - 2021 Realization of new electronic phase transitions based on quantum tunneling processes by a strong mid-infrared electric-field pulse
2013 - 2016 Rapid and efficient control of physical properties by terahertz pulses in electronic-type ferroelectrics
2008 - 2012 Phase controls of molecular compounds by lights

2008 - 2012 Conducting board of Project,「New Frontier of Materials Science Opened by Molecular Degrees of Freedom」

2008 - 2010 Ultrafast coherent nonlinear optical responses in carbon nanotubes

2005 - 2008 Nonlinear optical responses and ultrafast switching phenomena in conjugated polymers

2004 - 2008 Creation of novel state of matter by ultrafast collective photo-excitation

2003 - 2007 Science of Nano-Wire Metal Complexes with Strong Electron-Correlation

2004 - 2006 Explorations of new optical switching phenomena in strongly correlated electron systems

2003 - 2006 Application of Molecular Spins : from Nanomagnets to Biological Spin Systems

2004 - 2005 有機電荷移動錯体における超高速光誘起絶縁体-金属転移の探索

2001 - 2003 Study of gigantic third-order optical nonlinearity in low-dimensional correlated electron systems

1999 - 2001 PHTO-INDUCED PHASE TRANSITION AND ITS FORERUNNING PHENOMENON ON THE QUASI-ONE-DIMENSIONAL HALOGEN-BRIDGED TRANSITION METAL COMPOUNDS

1998 - 2001 Solid State Properties of Metal-Assembled Complexes

2000 - 2000 一次元遷移金属錯体における強い電子間相互作用,電子格子相互作用と光物性

1999 - 1999 一次元遷移金属錯体における強い電子格子相互作用、電子間相互作用と光物性

1998 - 1998 一次元遷移金属錯体における新規超構造の創出と磁気光学特性の開拓

1996 - 1996 磁性イオンを含む一次元遷移金属錯体における磁気光学効果の研究

1996 - 1996 モット転移系ハロゲン架橋Ni錯体における物性開拓

1994 - 1995 DYNAMICS OF SOLITONS AND POLARONS IN QUASI-ONE-DIMENSIONAL HALOGEN-BRIDGED MIXED-VALENCE COMPOUNDS

1994 - 1994 一次元有機金属錯体における光伝導性の制御

1994 - 1994 強相関系ハロゲン架橋Ni錯体の電子構造と伝導性

1993 - 1993 有機遷移金属錯体における光キャリアのダイナミクス

1991 - 1993 New Ptotoconductive Device of Electron-Proton System

1991 - 1991 鎖間水素結合を利用した新規電導機構の設計

1989 - 1990 Control of Functions of Molecular Devices on the Bases of Electron-Proton Transfer.

1989 - 1989 電子・プロトン協力現象に基づいた新電導物質の設計

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Papers (432)：

R. Namba, K. Imamura, R. Ishioka, K. Ishihara, T. Miyamoto, H. Okamoto, Y. Shimizu, Y. Saito, Y. Agarmani, M. Lang, et al. Two-step growth of high-quality single crystals of the Kitaev magnet α-RuCl 3. Physical Review Materials. 2024. 8. 7
J. Tokimoto, S. Ohmura, A. Takahashi, K. Iwano, H. Okamoto. Extraction of important degrees of freedom in quantum dynamics using singular value decomposition: Application to linear optical spectrum in two-dimensional Mott insulators. Physical Review B. 2024. 109. 19
Tomoko Fujino, Ryohei Kameyama, Kota Onozuka, Kazuki Matsuo, Shun Dekura, Tatsuya Miyamoto, Zijing Guo, Hiroshi Okamoto, Toshikazu Nakamura, Kazuyoshi Yoshimi, et al. Orbital hybridization of donor and acceptor to enhance the conductivity of mixed-stack complexes. Nature Communications. 2024. 15. 1
Zijing Guo, Tetsu Sato, Yang Han, Naoki Takamura, Ryohei Ikeda, Tatsuya Miyamoto, Noriaki Kida, Makiko Ogino, Youtarou Takahashi, Naotaka Kasuya, et al. Band transport evidence in PEDOT:PSS films using broadband optical spectroscopy from terahertz to ultraviolet region. Communications Materials. 2024. 5. 1
Daiki Sakai, Takashi Yamakawa, Hajime Ueda, Ryohei Ikeda, Tatsuya Miyamoto, Hiroshi Okamoto. Destabilization of spin-Peierls phase via a charge-spin modulated Floquet state induced by intramolecular vibrational excitation. Communications Physics. 2024. 7. 40:1-40:10

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MISC (355)：

難波隆一, 今村薫平, 池内萌, 出倉駿, 森初果, 宮本辰也, 岡本博, 村山陽奈子, 笠原裕一, 松田祐司, et al. Synthesis and characterization of single crystalline samples of the Kitaev spin liquid candidate α-RuCl₃ by the sublimation method. 日本物理学会講演概要集(CD-ROM). 2023. 78. 1
Noriaki Kida, Tatsuya Miyamoto, Hiroshi Okamoto. Emission of Terahertz Electromagnetic Waves: A New Spectroscopic Method to Investigate Physical Properties of Solids. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. 2022. 91. 11
藤野智子, 亀山亮平, 小野塚洸太, 松尾一輝, 出倉駿, 宮本辰也, GUO Zijing, 岡本博, 森初果. Highly conducting single crystals of mixed stack charge-transfer complexes based on ethylenedicarcogenothiophene dimers: synthesis and physical property. 日本化学会春季年会講演予稿集(Web). 2022. 102nd
藤野智子, 亀山亮平, 小野塚洸太, 松尾一輝, 出倉駿, 宮本辰也, GUO Zijing, 岡本博, 中村敏和, 森初果. Alternately stacked charge-transfer complexes in a neutral-ionic boundary region: high conductivity and phase transition behavior. 分子科学討論会講演プログラム&要旨(Web). 2022. 16th
藤野智子, 亀山亮平, 小野塚洸太, 松尾一輝, 出倉駿, 宮本辰也, G. Zijing, 岡本博, 中村敏和, 森初果. Alternately stacked charge-transfer complexes in a neutral-ionic boundary region: high conductivity and phase transition behavior. 日本物理学会講演概要集(CD-ROM). 2022. 77. 2

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Lectures and oral presentations (424)：

テラヘルツ・中赤外パルスで誘起される強相関系の非線形光学応答、非平衡励起状態と相転移
(第32回光物性研究会(2021) 2021)
Nonlinear electronic responses and phase transitions induced by a strong mid-infrared pulse in correlated electron materials
(2021)
テラヘルツ・中赤外パルスで誘起される強相関系の非線形光学応答,非平衡励起状態と相転移
(東大駒場 2021年夏学期第3回物性セミナー 2021)
(一般シンポジウム講演)中赤外強電場パルスで誘起される非平衡電子状態と相転移
(日本物理学会第76回年次大会 2021)
(一般シンポジウム講演)中赤外強電場パルスで誘起される非平衡電子状態と相転移
(日本物理学会第75回年次大会 2020)

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Professional career (1)：

工学博士

Awards (1)：

2008/02 - 財団法人井上科学振興財団第24回井上学術賞

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