Misc - MIYAMOTO Tatsuya
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Advanced Spectroscopic Measurements of Carrier Dynamics in Organic Semiconductors
宮本辰也, 大瀧貴史, 貴田徳明, 岡本博, 岡本博
計測と制御 60 ( 3 ) 2021
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Observation of ultrafast spin-relaxation and magnon precession dynamics in photoexcited states of a cuprate Mott insulator
54 ( 9 ) 459 - 473 2019.09
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Emission of Terahertz Electromagnetic Waves by Femtosecond Laser Pulse Irradiation in Solids and Its Application to Materials Science
貴田徳明, 宮本辰也, 岡本博, 岡本博
日本物理学会誌 74 ( 5 ) 2019
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固体物理〈高強度テラヘルツ・赤外パルスが拓く非平衡物性〉III.テラヘルツパルスによる応答 テラヘルツパルスによる電子型誘電体の超高速分極制御とその機構の解明
宮本辰也, 高橋聡
54 ( 11 ) 2019
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Ultrafast insulator-metal transition induced by a terahertz pulse
山川大路, 宮本辰也, 岡本博, 岡本博
応用物理 88 ( 2 ) 2019
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Ultrafast polarization control by a terahertz and optical pulse in electronic-type ferroelectrics
49 ( 4 ) 279 - 298 2014.04
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Melting of excitonic insulator phase by an intense terahertz pulse in Ta$_2$NiSe$_5$
Naoki Takamura, Tatsuya Miyamoto, Ryohei Ikeda, Tetsushi Kubo, Masaki Yamamoto, Hiroki Sato, Yang Han, Takayuki Ito, Tetsu Sato, Akitoshi Nakano, Hiroshi Sawa, Hiroshi Okamoto
2023.09
In this study, the optical response to a terahertz pulse was investigated in
the transition metal chalcogenide Ta$_2$NiSe$_5$, a candidate excitonic
insulator. First, by irradiating a terahertz pulse with a relatively weak
electric field (0.3 MV/cm), the spectral changes in reflectivity near the
absorption edge due to third-order optical nonlinearity were measured and the
absorption peak characteristic of the excitonic phase just below the interband
transition was identified. Next, by irradiating a strong terahertz pulse with a
strong electric field of 1.65 MV/cm, the absorption of the excitonic phase was
found to be reduced, and a Drude-like response appeared in the mid-infrared
region. These responses can be interpreted as carrier generation by exciton
dissociation induced by the electric field, resulting in the partial melting of
the excitonic phase and metallization. The presence of a distinct threshold
electric field for carrier generation indicates exciton dissociation via
quantum-tunnelling processes. The spectral change due to metallization by the
electric field is significantly different from that due to the strong optical
excitation across the gap, which can be explained by the different melting
mechanisms of the excitonic phase in the two types of excitations.Other Link： http://arxiv.org/pdf/2309.05286v1
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Synthesis and characterization of single crystalline samples of the Kitaev spin liquid candidate α-RuCl<sub>3</sub> by the sublimation method
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, 石原滉大, 橋本顕一郎, 芝内孝禎
日本物理学会講演概要集(CD-ROM) 78 ( 1 ) 2023
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水素結合型分子性強誘電体の中赤外プロトン振動励起で誘起される集団モードからのテラヘルツ放射
尤仕佳, 宮本辰也, 山川貴士, 堀内佐智雄, 貴田徳明, 岡本博
78 ( 1 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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一次元モット絶縁体における励起子の量子干渉によるテラヘルツ放射
宮本辰也, 近藤秋洋, 稲葉岳, 森本剛史, 尤仕佳, 岡本博
78 ( 1 ) 2023
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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テラヘルツ電場誘起時間分解カー効果によるフェロアキシャル物質の新しい非線形光学効果の観測
山本真毅, 佐藤弘基, 宮本辰也, 木村健太, 木村剛, 岡本博
78 ( 1 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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Carrier dynamics in the photoinduced insulator-metal transition in Ta2NiSe5 investigated by optical-pump terahertz-probe spectroscopy
Y. Han, Y. Murata, T. Miyamoto, N. Takamura, N. Kida, A. Nakano, H. Sawa, and H. Okamoto
78 ( 1 ) 2023
Language：English Publishing type：Research paper, summary (national, other academic conference)
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高強度テラヘルツ電場パルスによる有機分子性結晶TTF-CAのイオン性－中性転移Ⅱ
久保哲士, 髙村直幹, 山本真毅, 佐藤弘基, 酒井大輝, 宮本辰也, 高橋幸裕, 岡本博
78 ( 1 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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中赤外分子内振動励起で誘起されるフォノンドレストフロッケ状態を介したスピンパイエルス相の不安定化
酒井大輝, 山川貴士, 上田朔, 宮本辰也, 貴田徳明, 岡本博
78 ( 1 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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キタエフスピン液体候補物質α-RuCl3 のsublimation 法による単結晶試料合成と特性評価
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、 松田裕司、石原浩大、 橋本顕一郎 、芝内孝禎
78 ( 1 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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ノンコリニア反強磁性金属TbB4における電気磁気光学効果
荒川慶人, 林田健志, 木村健太, 三澤龍介, 宮本辰也, 伊賀文俊, 岡本博, 木村剛
78 ( 1 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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非線形光学効果でみたフェロアキシャル物質の横応答
木村健太, 宮本辰也，山本真毅，佐藤弘基，岡本博，木村剛
78 ( 1 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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励起子絶縁体Ta2NiSe5におけるテラヘルツ電場誘起金属化―多層膜モデルによる過渡反射スペクトルの精密解析―
宮本辰也，高村直幹，中埜彰俊，澤博，岡本博
78 ( 2 ) 2023
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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円偏光フェムト秒パルス励起によるBi2CuO4からのテラヘルツ放射
4. 伊藤敬之, 宮本辰也, 尤仕佳, 大竹雄太郎, 木村健太, 木村剛, 岡本博
78 ( 1 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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分子性強誘電体TTF-CAにおけるテラヘルツ電場誘起分極変化ダイナミクス ―テラヘルツ反射分光に基づくコヒーレント振動の解析―
久保哲士，佐藤鉄，池田良平，酒井大輝，山本真毅，宮本辰也, 岡本博
78 ( 2 ) 2023
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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