Observation and control of conformation dynamics by intense coherent light

2009 Fiscal Year Final Research Report

• Project/Area Number: 18205005
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Institute for Molecular Science
• Principal Investigator: OHSHIMA Yasuhiro Institute for Molecular Science, 光分子科学研究領域, 教授 (60213708)
• Co-Investigator(Kenkyū-buntansha): HASEGAWA Hirokazu 分子科学研究所, 光分子科学研究領域, 助教 (20373350)
• Project Period (FY): 2006 – 2009
• Keywords: 分子分光

Research Abstract

Coherent nonlinear spectroscopy both in frequency and real-time domains has been implemented for observation and control of conformational dynamics of molecular systems that can flexibly transform their structures. Large-amplitude orientational changes in several molecular clusters containing benzene have been identified in details, and coherent excitation of intermolecular vibrations has been realized by the irradiation of intense nonresonant ultrafast pulses. The present experimental attainments are expected to lead to coherent control of isomerization of flexible molecules.

Research Products

• [Journal Article] Vibrational and rotational structure and excited-state dynamics of pyrene (2009)
  • Author(s): M. Baba, M. Saitoh, Y. Kowaka, K. Taguma, K. Yoshida, Y. Semba, S. Kasahara, T. Yamanaka, Y. Ohshima, Y.-C. Hsu, S.H. Lin
  • Journal Title: J. Chem. Phys. 131 Pages: 224318-1-10
  • Peer Reviewed
• [Journal Article] Ultrafast angular-momentum orientation by linearly polarized laser fields (2009)
  • Author(s): K. Kitano, H. Hasegawa, Y. Ohshima
  • Journal Title: Phys. Rev. Lett. 103 Pages: 223003-1-4
  • Peer Reviewed
• [Journal Article] Rotationally resolved ultrahigh-resolution laser spectroscopy of the S2 1A1←S0 1A1 transition of azulene (2009)
  • Author(s): Y. Semba, K. Yoshida, S. Kasahara, C.-K. Ni, Y.-C. Hsu, S.H. Lin, Y. Ohshima, M. Baba
  • Journal Title: J. Chem. Phys. 131 Pages: 024303-1-6
  • Peer Reviewed
• [Journal Article] Quantum state reconstruction of a rotational wave packet created by a nonresonant intense femtosecond laser field (2008)
  • Author(s): H. Hasegawa, Y. Ohshima
  • Journal Title: Phys. Rev. Lett. 101 Pages: 053002-1-4
  • Peer Reviewed
• [Journal Article] Nonadiabatic rotational excitation of benzene by nonresonant intense femtosecond laser fields (2008)
  • Author(s): H. Hasegawa, Y. Ohshima
  • Journal Title: Chem. Phys. Lett. 454 Pages: 148-152
  • Peer Reviewed
• [Journal Article] Interplay of methyl-group internal rotation and fine and hyperfine interaction in a free radical: Fourier transform microwave spectroscopy of acetyl radical (2007)
  • Author(s): E. Hirota, A. Mizoguchi, Y. Ohshima, K. Katoh, Y. Sumiyoshi, Y. Endo
  • Journal Title: Mol. Phys. 105 Pages: 455-466
  • Peer Reviewed
• [Journal Article] Decoding the state distribution in a nonadiabatic rotational excitation by a nonresonant intense laser field (2006)
  • Author(s): H. Hasegawa, Y. Ohshima
  • Journal Title: Phys. Rev. A 74 Pages: 061401-1-4 (R)
  • Peer Reviewed
• [Presentation] Coherent rotational/vibrational dynamics of gas-phase molecules induced by intense ultrafast laser fields (2010)
  • Author(s): Y. Ohshima
  • Organizer: Seminar, National Chiao Tung Univ.
  • Place of Presentation: Hsinchu, Taiwan(Invited)
  • Year and Date: 2010-03-03
• [Presentation] 強度レーザー場によって誘起される分子振動・回転のコヒーレント光ダイナミクス (2010)
  • Author(s): 大島康裕
  • Organizer: レーザー学会第30回年次大会, 千里ライフサイエンスセンター
  • Place of Presentation: 大阪府豊中市
  • Year and Date: 2010-02-02
• [Presentation] Coherent molecular rotational and vibrational dynamics induced by nonresonant intense short laser pulses (2009)
  • Author(s): H. Hasegawa, Y. Ohshima
  • Organizer: 4th Winter School of Asian CORE Program, Seoul National Univ.
  • Place of Presentation: Seoul, Korea
  • Year and Date: 20091214-20091215
• [Presentation] UV laser spectroscopy of He-benzene (2009)
  • Author(s): M. Hayashi, Y. Ohshima
  • Organizer: 4th Winter School of Asian CORE Program, Seoul National Univ.
  • Place of Presentation: Seoul, Korea
  • Year and Date: 20091214-20091215
• [Presentation] Chirped ns-pulse light source for adiabatic Raman passage (2009)
  • Author(s): S. Miyake, Y. Ohshima
  • Organizer: 4th Winter School of Asian CORE Program, Seoul National Univ.
  • Place of Presentation: Seoul, Korea
  • Year and Date: 20091214-20091215
• [Presentation] Wavepacket manipulation of methyl-internal rotation (2009)
  • Author(s): K. Kitano, Y. Ohshima
  • Organizer: 3rd Winter School of Asian CORE Program, National Taiwan Univ.
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 20090116-20090119
• [Presentation] Construction of a single-mode nanosecond optical parametric amplifier seeded by an external cavity diode laser (2009)
  • Author(s): S. Miyake, Y. Ohshima
  • Organizer: 3rd Winter School of Asian CORE Program, National Taiwan Univ.
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 20090116-20090119
• [Presentation] Coherent rotational/vibrational dynamics of molecules induced by intense ultrafast laser fields (2008)
  • Author(s): Y. Ohshima
  • Organizer: 8th Asian International Seminar on Atomic and Molecular Physics, Univ. of Western Australia
  • Place of Presentation: Perth, Australia(Invited)
  • Year and Date: 2008-11-28
• [Presentation] Coherent rotational dynamics of molecules in intense laser field (2008)
  • Author(s): Y. Ohshima
  • Organizer: The 15th International School on Quantum Electronics“Laser Physics and Applications, "
  • Place of Presentation: Bourgas, Bulgaria(Invited)
  • Year and Date: 2008-09-18
• [Presentation] Nonadiabatic rotational excitation by nonresonant intense ultrafast laser fields (2007)
  • Author(s): Y. Ohshima
  • Organizer: The 2nd Canada-Japan SRO- COAST Symposium on Ultrafast Intense Laser Science, Laval Univ.
  • Place of Presentation: Quebec, Canada(Invited)
  • Year and Date: 2007-03-08
• [Presentation] クールな原子・分子の科学 (2006)
  • Author(s): 大島康裕
  • Organizer: 分子科学研究会シンポジウム, 岡崎コンファレンスセンター
  • Place of Presentation: 岡崎
  • Year and Date: 2006-06-02
• [Remarks] 新聞報道雑誌論文(2)が下記の記事で紹介された。科学新聞(2010年1月1日付け)
  • URL: http://www.ims.ac.jp/know/light/oshima/ohshima.html