2012 Fiscal Year Final Research Report
Dynamics of high-density excited states and photo-induced phases in novel semiconductors
| Project Area | Optical science of dynamically correlated electrons in semiconductors |
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| Project/Area Number |
20104007
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Osaka University |
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Principal Investigator |
ASHIDA Masaaki 大阪大学, 基礎工学研究科, 教授 (60240818)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Koichiro 京都大学, 学内共同利用施設等, 教授 (90212034)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUBARA Eiichi 大阪大学, 大学院・基礎工学研究科, 特任助教 (10421992)
HIRORI Hidemoto 京都大学, 物質-細胞統合システム拠点, 特定拠点助教 (00512469)
SHIRAI Masanobu 京都大学, 物質-細胞統合システム拠点, 特定拠点助教 (30303803)
WATA1NABE Masayuki 京都大学, 大学院・人間環境学研究科, 助教 (20240525)
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| Project Period (FY) |
2008 – 2012
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| Keywords | テラヘルツ / 強相関電子系 / 酸化物 / 高密度光励起 / 光誘起相転移 / 光物性 / 空気プラズマ |
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| Research Abstract |
To investigate the dynamics of photo-induced phases of high-density excited states in novel semiconductors, such as oxides, ultrabroadband time domain spectroscopy, which provides electric field detection, has been successfully developed, so that it covers from sub-terahertz up to near-infrared 200 THz, which is the world’s highest frequency. As a result, new phonon modes in a quantum paraelectrics were observed. Moreover, the highest terahertz conversion efficiency was achieved and a novel frequency change of the phonon modes in the quantum paraelectrics caused by irradiation of the highly intense terahertz wave, which suggests a new way of material control.
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[Journal Article] Electric field detection of coherent synchrotron radiation in a storage ring generated using laser bunch slicing2012
Author(s)
I. Katayama, H. Shimosato, M. Bito, K. Furusawa, M. Adachi, M. Shimada, H. Zen, S. Kimura, N. Yamamoto, M. Hosaka, M. Katoh, and M. Ashida
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Journal Title
Appl. Phys. Lett
Volume: 100
Pages: 111112
DOI
Peer Reviewed
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[Presentation] Coherent Synchrotron Terahertz Radiation Using Electron Bunch Slicing2010
Author(s)
I. Katayama, H. Simosato, M. Bito, K. Furusawa, M. Adachi, M. Simada, H. Zen, S. Kimura, N. Yamamoto, M. Hosaka, M. Katoh, M. Ashida
Organizer
35th International Conference on Infrared, Millimeter and Terahertz Waves IRMMW-THz2010
Place of Presentation
Rome, Italy
Year and Date
20100905-10
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