All optical measurement of attosecond pulses and laser plasma dynamics using liquid-sheet jets

• Project/Area Number: 17H02802
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: National Institutes for Quantum and Radiological Science and Technology
• Principal Investigator: Itakura Ryuji 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 光量子科学研究部, グループリーダー(定常) (80334241)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000); Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2018: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2017: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
• Keywords: プラズマミラー / 時間分解反射分光 / 周波数分解光ゲート法 / 高次高調波 / 真空紫外 / 液膜ジェット / レーザープラズマ / アト秒パルス計測 / アト秒物理 / 真空紫外反射分光 / 反射分光

Outline of Final Research Achievements

Plasma-mirror frequency-resolved optical gating (PM-FROG) is a method by all optical measurement.　We demonstrated that PM-FROG is applicable to characterization of 20-fs pulses. We could characterize a nearly Fourier transform limited vacuum ultraviolet pulse with the pulse duration of 20 fs and the wavelength of 160 nm. In addition, a spatial dependence of plasma reflectivity could be observed.
We demonstrated that a liquid-sheet jet of water is used in the PM-FROG measurement of an ultraviolet pulse. The validity of the PM-FROG measurement was confirmed by the measurement with self-diffraction FROG. We revealed the electronic excitation dynamics in the surface of water liquid sheet through the time-dependent complex reflectivity obtained by the PM-FROG.

Academic Significance and Societal Importance of the Research Achievements

現在のアト秒パルスを用いた実験において、パルス幅計測は気相原子、分子のイオン化を介した測定に限定されている。その正確性や手法の限界を評価する上で、PM-FROG は独立した別の手法であり、アト秒科学の更なる発展に貢献するものと期待できる。また、アト秒科学は、気相の原子分子から、固体や液体に対象が拡張してきており、その観点からも、固体表面や液体をターゲットとした計測法の実現は大きな意義がある。また、近年、レーザー加工などの産業応用においても、その学理解明が重要視されており、本研究の成果は、物質の励起の根幹である電子ダイナミクスを時空間分解測定するため測定法として貢献する可能性を持つ。

Research Products

• [Journal Article] 超高速プラズマミラー生成によるレーザーパルス波形計測 (2020)
  • Author(s): 板倉 隆二
  • Journal Title: プラズマ・核融合学会誌 Volume: 96 Pages: 186-189
  • Open Access
• [Journal Article] Characterization of 20-fs VUV pulses by plasma-mirror frequency-resolved optical gating (2019)
  • Author(s): R. Itakura, H. Akagi, and T. Otobe
  • Journal Title: Optics Letters Volume: 44 Issue: 9 Pages: 2282-2285
  • DOI: 10.1364/ol.44.002282
  • Peer Reviewed
• [Journal Article] Plasma-mirror frequency-resolved optical gating using a liquid-sheet jet in ultraviolet region (2019)
  • Author(s): T. Endo, M. Tsubouchi, and R. Itakura
  • Journal Title: Optics Letters Volume: 44 Issue: 13 Pages: 1539-1542
  • DOI: 10.1364/ol.44.003234
  • Peer Reviewed
• [Presentation] 強レーザーパルスと水の相互作用 (2020)
  • Author(s): 板倉 隆二
  • Organizer: シンポジウム「DNA損傷・修復と高強度レーザー化学の交差点」
  • Invited
• [Presentation] Laser ablation probed by time-resolved reflection spectroscopy (2019)
  • Author(s): Ryuji Itakura
  • Organizer: Mini-workshop on Nonlinear response in Laser-Matter Interaction
  • Int'l Joint Research / Invited
• [Presentation] Plasma-mirror FROG using liquid-sheet water jet in ultraviolet region (2019)
  • Author(s): Tomoyuku Endo, Masaaki Tsubouchi, Ryuji Itakura
  • Organizer: CLEO/Europe-EQEC 2019
  • Int'l Joint Research
• [Presentation] Time-resolved reflection spectroscopy of water liquid-sheet jet (2019)
  • Author(s): Tomoyuki Endo, Masaaki Tsubochi, Ryuji Itakura
  • Organizer: International Symposium on Ultrafast Intense Laser Science
  • Int'l Joint Research
• [Presentation] Time-resolved reflection spectroscopy of water liquid-sheet jet excited by intense laser pulses (2019)
  • Author(s): Tomoyuki Endo, Masaaki Tsubochi, Ryuji Itakura
  • Organizer: 35th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] VUV waveform characterization by reflectivity depletion in laser ablation of Si (2019)
  • Author(s): Ryuji Itakura, Hiroshi Akagi, Tomohito Otobe
  • Organizer: 35th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] VUV waveform characterization by reflectivity depletion in laser ablation of Si (2019)
  • Author(s): Ryuji Itakura, Hiroshi Akagi, Tomohito Otobe
  • Organizer: 光・量子ビーム科学合同シンポジウム2019
• [Presentation] 液膜ジェットを用いた水の強レーザー場励起過程の時間分解反射分光計測 (2019)
  • Author(s): 遠藤 友随, 坪内 雅明, 板倉 隆二
  • Organizer: 光・量子ビーム科学合同シンポジウム2019
• [Presentation] アブレーションによる反射率変化を用いた真空紫外パルス波形計測 (2019)
  • Author(s): 板倉 隆二, 赤木 浩, 乙部 智仁
  • Organizer: 第66回応用物理学会春季学術講演会
• [Presentation] 液膜プラズマミラーを用いた周波数分解光ゲート計測法の開発 (2019)
  • Author(s): 遠藤 友随, 坪内 雅明, 板倉 隆二
  • Organizer: 第66回応用物理学会春季学術講演会
• [Presentation] 真空紫外パルスの位相計測と電子状態制御 (2019)
  • Author(s): 遠藤 友随, 板倉 隆二, 坪内 雅明, 赤木 浩, 乙部 智仁, 中嶋隆
  • Organizer: 京都大学エネルギー理工学研究所 ゼロエミッションエネルギー研究拠点 平成３０年度共同利用・共同研究成果報告会
• [Presentation] 液膜プラズマミラーを用いた紫外領域における周波数分解光ゲート計測 (2019)
  • Author(s): 遠藤 友随, 坪内 雅明, 板倉 隆二
  • Organizer: レーザー学会学術講演会第39回年次大会
• [Presentation] VUV waveform characterization by reflection of highly excited solids (2018)
  • Author(s): Ryuji Itakura
  • Organizer: 9th The Shanghai Tokyo Advanced Research (STAR) Symposium on Ultrafast Intense Laser Science
  • Int'l Joint Research / Invited
• [Presentation] 真空紫外領域の高調波波形計測と実時間レーザープラズマ観測 (2018)
  • Author(s): 板倉 隆二
  • Organizer: 応用物理学会北海道支部講演会
  • Invited
• [Presentation] 真空紫外領域の高調波波形計測と実時間レーザープラズマ観測 (2018)
  • Author(s): 板倉 隆二
  • Organizer: RIKEN-RAP and QST-KPSI Joint Seminar
• [Presentation] アト秒科学への展望 (2017)
  • Author(s): 板倉 隆二
  • Organizer: 第１回アト秒レーザー科学研究施設シンポジウム
  • Invited
• [Presentation] Intense laser induced spatio-temporal dynamics of transparent solid probed by VUV reflection (2017)
  • Author(s): Ryuji Itakura, Hiroshi Akagi, Yoriko Wada, Tomohito Otobe
  • Organizer: International Symposium on Ultrafast Intense Laser Science
  • Int'l Joint Research
• [Presentation] Time-Resolved VUV Reflection Spectroscopy for Spatio-Temporal Characterization of Ultrafast Plasma Formation (2017)
  • Author(s): Ryuji Itakura, Hiroshi Akagi, Yoriko Wada, Tomohito Otobe
  • Organizer: CLEO/ Europe-EQEC 2017
  • Int'l Joint Research
• [Presentation] 時間分解反射分光によるレーザープラズマ計測 (2017)
  • Author(s): 板倉 隆二
  • Organizer: 光・量子ビーム科学合同シンポジウム2017
• [Presentation] Spatio-temporal diagnosis of laser-plasma formation on transparent solid probed by VUV reflection (2017)
  • Author(s): Ryuji Itakura
  • Organizer: The 8th Shanghai Tokyo Advanced Research Symposium on Ultrafast Intense Laser Science
  • Int'l Joint Research / Invited
• [Presentation] Time-resolved VUV reflection spectroscopy for spatio-temporal diagnosis of ultrafast plasma formation (2017)
  • Author(s): Ryuji Itakura, Hiroshi Akagi, Yoriko Wada, Tomohito Otobe
  • Organizer: The 6th Advanced Lasers and Photon Sources
  • Int'l Joint Research
• [Presentation] Time-resolved VUV reflection spectroscopy of spatio-temporal dynamics of transparent solid in intense laser fields (2017)
  • Author(s): Ryuji Itakura, Yoriko Wada, Hiroshi Akagi, Tomohito Otobe
  • Organizer: 第2回アト秒科学に関する国際シンポジウム
  • Int'l Joint Research
• [Presentation] Space- and time-resolved VUV reflection spectroscopy of fused silica excited by an intense laser pulse (2017)
  • Author(s): Ryuji Itakura, Hiroshi Akagi, Yoriko Wada, Tomohito Otobe
  • Organizer: 33rd Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Remarks] 超高速光物性研究グループ
  • URL: https://www.qst.go.jp/site/kansai-dapr/2657.html
• [Remarks] Ultrafast Dynamics Group
  • URL: https://www.qst.go.jp/site/kansai-adprenglish/2879.html
• [Remarks] 関西光科学研究所 超高速光物性研究グループ
  • URL: https://www.qst.go.jp/site/kansai/2657.html
• [Remarks] 関西光科学研究所 | 組織：超高速光物性研究Ｇ
  • URL: http://www.kansai.qst.go.jp/organization-1-3.html