Ultrafast electric field induced phenomena caused by terahertz metallic metamaterial and device application

2016 Fiscal Year Final Research Report

• Project/Area Number: 26286061
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: Kyoto University
• Principal Investigator: Hirori Hideki 京都大学, 物質ー細胞統合システム拠点, 准教授 (00512469)
• Co-Investigator(Kenkyū-buntansha): 望月 敏光 国立研究開発法人産業技術総合研究所, その他部局等, 研究員 (30549572)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 半導体 / 磁性体 / 高強度テラヘルツ / 非線形光学 / 超高速分光 / メタマテリアル / 相変化材料 / 金属絶縁体転移

Outline of Final Research Achievements

In this research, in order to elucidate ultrafast electric field induced phenomena in nanostructured semiconductors and next-generation electronic materials, it aimed to create an ultrafast measurement method for the electric-field induced phenomena with the world's highest intensity THz pulse enhanced by metallic metamaterials. This gave us two main results. It is revealed that a subcycle response with a period shorter than the period of the THz light is demonstrated caused by a dressed state in which the THz light and the exciton (GaAs) are strongly coupled. We succeeded in observing the nonlinear antiferromagnetic resonance in the antiferromagnet by utilizing resonant magnetic field enhancement effect by high intensity terahertz pulse light source and split ring resonator (SRR).

Free Research Field

テラヘルツ非線形分光