Upgrading of Microspectroscopic Technique under Extreme Conditions and Understanding of Strongly Correlated Electron Systems

极端条件下显微光谱技术的升级和强相关电子系统的理解

• 批准号: 22560659
• 负责人: IRIZAWA Akinori
• 金额: $ 2.83万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560659/
• 关键词: 光物性; 多元極限; 赤外; テラヘルツ; 顕微分光; 自由電子レーザー; 遠赤外; 光学応答; 強相関電子; 多元極限下; 放射光; 固体電子; FEL

The spectroscopy under extreme conditions has been studied and established at the energy from Fermi level to 10 meV above which is important energy region for understanding electronic states of strongly correlated electron systems. Optical studies in an infrared-terahertz region using a synchrotron radiation (SR) or a free electron laser (FEL) that have an advantage of brightness at around the wavelength of 100 μm have been investigated for evolving spectro-microscopy for small samples under low temperature, high pressure, and strong magnetic field. The success of polarization control of FEL enabled experiments in an infrared-terahertz region about vibrational circular dichroism (VCD) in optically active compounds or magnetically circular dichroism (MCD) in magnetic compounds. High speed spectroscopic imaging experiments were realized as a pulse-by-pulse raster scan method.

研究并建立了费米能级至10 meV以上的极端条件下的能谱，这是理解强相关电子系统电子态的重要能量区域。利用同步辐射（SR）或自由电子激光（FEL）在100 μm波长附近的亮度优势，研究了在低温、高压和强磁场下对小样品进行进化光谱显微镜的红外太赫兹区域光学研究。FEL偏振控制的成功实现了在红外-太赫兹波段对光活性化合物的振动圆二色性（VCD）或磁性化合物的磁性圆二色性（MCD）的实验。高速光谱成像实验采用逐脉冲光栅扫描方法实现。

项目成果

Terahertz Spectroscopy and Imaging by means of ISIR THz-FEL at Osaka University

大阪大学利用 ISIR THz-FEL 进行太赫兹光谱和成像

• 发表时间: 2013
• 作者: Masaki Fujimoto;Ryukou Kato;Keigo Kawase;Akinori Irizawa;Fumiyoshi Kmaitsukasa;Hiroki Ohsumi;Masaki Yaguchi;Goro Isoyama;A. Irizawa
• 通讯作者: A. Irizawa

Terahertz Free Electron Laser at Osaka University

大阪大学太赫兹自由电子激光器

• 发表时间: 2012
• 作者: A. S. Groombridge;K. Inagaki;K. Nagasawa;T. Okahashi;S. Fujii;A. Takatsu;K. Chiba;Akinori Irizawa
• 通讯作者: Akinori Irizawa

A high-power semiconductor switch for the L-band linac

用于L波段直线加速器的大功率半导体开关

• 发表时间: 2013
• 作者: F. Kamitsukasa;A. Tokuchi;S. Suemine;K. Furukawa;K. Kubo;R. Kato;K. Kawase;A. Irizawa;M. Fujimoto;H. Ohsumi;M. Yaguchi;G. Isoyama
• 通讯作者: G. Isoyama

Feed-forward control of the amplitude and the phase of a high-power RF pulse based on the overdrive technique

基于过驱动技术的高功率射频脉冲幅度和相位的前馈控制

• DOI: 10.1016/j.nima.2012.03.004
• 发表时间: 2012
• 期刊: Nucl. Instr. Meth. A
• 作者: A.Adare;H.Hamagaki;他(PHENIX Collaboration);神本丈;Kazuyuki Sakaue;Koichi Hamaguchi;T. Ohsawa;Shigeru Kashiwagi
• 通讯作者: Shigeru Kashiwagi

Optical study on strongly correlated electron system LiV2O4

• DOI: 10.1088/1742-6596/200/1/012068
• 发表时间: 2010
• 作者: A. Irizawa;K. Shimai;T. Nanba;S. Niitaka;H. Takagi