高強度レーザーによる多電子系超高速実時間イメージング法

2015 Fiscal Year Research-status Report

• Project/Area Number: 26400415
• Research Institution: The University of Electro-Communications
• Principal Investigator: 森下 亨 電気通信大学, 学内共同利用施設等, 准教授 (20313405)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: アト秒 / トンネルイオン化

Outline of Annual Research Achievements

本研究では、高強度レーザーを利用した超高速分子イメージング法の開発を行っている。とくに、分子内の複数の電子が相関をもって時々刻々動く様子を実時間でとらえる、多電子の動的なイメージングについて様々な観点から吟味する。本年度は、多体系のダイナミクス分析に重要である、クーロン３体系の高精度波動関数の構築と分析についての研究を行った。また、高強度レーザーパルス照射による原子のトンネルイオン化についての研究も行った。得られた結果をまとめて学術論文として発表した。さらに、分子構造決定のための散乱コードおよび分析法の開発を進めた。また、関連する強レーザー場中の原子・分子ダイナミクスについての研究も行った。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

当初の目的どおり、多体系のダイナミクスの理解に重要であるトンネルイオン化理論、および散乱波動関数の研究がおおむね順調に進んでいる。

Strategy for Future Research Activity

今後は、これまでに得られた知見をもとに、簡単な分子についてのダイナミクス研究を進めていく。また、実験データの解析も進める。

Research Products

• [Int'l Joint Research] MIPT(ロシア連邦)
  • Country Name: RUSSIA FEDERATION
  • Counterpart Institution: MIPT
• [Int'l Joint Research] Kansas State U(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: Kansas State U
• [Int'l Joint Research] Fu-Jen Catholic U(Taiwan)
  • Country Name: その他の国・地域
  • Counterpart Institution: Fu-Jen Catholic U
• [Journal Article] Femtosecond two-photon Rabi oscillations in excited He driven by ultrashort intense laser fields (2016)
  • Author(s): M. Fushitani, C.-N. Liu, A.Matsuda, T. Endo, Y. Toida, M. Nagasono, T. Togashi, M. Yabashi, T. Ishikawa, Y. Hikosaka, T. Morishita, and A. Hishikawa
  • Journal Title: Nat. Photon. Volume: 10 Pages: 102-105
  • DOI: 10.1038/nphoton.2015.228
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Photoelectron sidebands induced by a chirped laser field for shot-by-shot temporal characterization of FEL pulses (2016)
  • Author(s): C.-N. Liu, T. Morishita., M. Fushitani and A. Hishikawa
  • Journal Title: J. Phys. B: At. Mol. Opt. Phys. Volume: 49 Pages: 034005[11pgs]
  • DOI: 10.1088/0953-4075/49/3/034005
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Numerical simulation of the double-to-single ionization ratio for the helium atom in strong laser fields (2015)
  • Author(s): Z. Chen, Y. Zheng, W. Yang, X. Song, J. Xu, L. F. DiMauro, O. Zatsarinny, K. Bartschat, T. Morishita, S.-F. Zhao, and C. D. Lin
  • Journal Title: Phys. Rev. A Volume: 92 Pages: 063427 [9pages]
  • DOI: 10.1103/PhysRevA.92.063427
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Analysis of a shift of the maximum of photoelectron momentum distributions generated by intense circularly polarized pulses (2015)
  • Author(s): M. Ohmi, O. I. Tolstikhin, and T. Morishita
  • Journal Title: Phys. Rev. A 92 Volume: 92 Pages: 043402[15pgs]
  • DOI: 10.1103/PhysRevA.92.043402
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Hyperspherical calculations of ultralow-energy collisions in Coulomb three-body systems (2015)
  • Author(s): Y. Zhou, S. Watanabe, O. I. Tolstikhin, and T. Morishita
  • Journal Title: Phys. Rev. A Volume: 92 Pages: 032713[10pgs]
  • DOI: 10.1103/PhysRevA.92.032713
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Weak-field asymptotic theory of tunneling ionization including the first-order correction terms: Application to molecules (2015)
  • Author(s): V. H. Trinh, V. N. T. Pham, O. I. Tolstikhin, and T. Morishita
  • Journal Title: Phys. Rev. A Volume: 91 Pages: 063410[18pages]
  • DOI: 10.1103/PhysRevA.91.063410
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Tunneling ionization of atoms and molecules under intense laser fields (2015)
  • Author(s): T. Morishita
  • Organizer: International Conference on Electron Spectroscopy and Structure, ICESS-2015
  • Place of Presentation: Stonybrook NY
  • Year and Date: 2015-09-28 – 2015-10-02
  • Int'l Joint Research / Invited
• [Presentation] Tunneling ionization of atoms and molecules under intense laser field (2015)
  • Author(s): T. Morishita and Oleg I. Tolstikhin
  • Organizer: International Conference on Photonic, Electronic and Atomic Collisions
  • Place of Presentation: Toredo, Spain
  • Year and Date: 2015-07-22 – 2015-07-28
  • Int'l Joint Research / Invited