2023 Fiscal Year Final Research Report
Attosecond Science in the sub-keV region
| Project/Area Number |
19H05628
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Review Section |
Broad Section D
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
Midorikawa Katsumi 国立研究開発法人理化学研究所, 光量子工学研究センター, センター長 (40166070)
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| Project Period (FY) |
2019-06-26 – 2024-03-31
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| Keywords | 量子エレクトロニクス / アト秒科学 / 超高速光科学 / レーザー工学 / 非線形光学 |
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| Outline of Final Research Achievements |
By compressing the high-energy mid-infrared pulse to two cycles using our uniquely developed DC-OPA and combining this with the loose focusing method, we generate high-energy attosecond high-order harmonics in the water window region. Furthermore, an optical synthesizer consisting of multi-cycle three-wavelength laser pulses realizes an almost single-cycle harmonic driving field and generates a GW class isolated attosecond pulse with high efficiency. We also succeeded in measuring the waveform by using an attosecond streaking method. In addition, we developed a new method for generating circularly polarized light pulses and an attosecond transient absorption simulator for application to the investigation of attosecond electron dynamics in atoms and molecules.
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| Free Research Field |
量子エレクトロニクス
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| Academic Significance and Societal Importance of the Research Achievements |
物質中の電子の動きを捉えることができるアト秒パルスレーザーは、物理学、化学、生物・医科学等の基礎科学分野のみならず、超高速電子デバイス等ならびに高性能触媒や人工光合成等の化学・材料等の産業分野においても必須のツールとなるとものと期待されている。本課題の成果は、このアト秒パルスの利用波長域を水の窓領域までに拡張し生命科学や材料・物性科学の進展に大きく貢献するものである。また、その強度を100倍以上に増強しアト秒領域の非線形光学という新領域への道筋を示した。
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