Study on cluster dynamics by a newly developed vibrational spectro-scopy using intense laser fields

• Project/Area Number: 21750029
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Physical chemistry
• Research Institution: Institute for Molecular Science
• Principal Investigator: HASEGAWA Hirokazu Institute for Molecular Science, 大学院・総合文化研究科, 准教授 (20373350)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2009: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 分子分光 / 高強度レーザー場 / 高強度レーザー光 / クラスター / 分子間ポテンシャル

Research Abstract

The purposes of our research are development of a new vibrational spectroscopy using a nonresonant intense femtosecond pulse (pump pulse) and determining intermolecular potential energy surfaces (PES) of molecular clusters. In order to do this, dependence of vibrational population on delay time among a pair of double pump pulses is measured. We demonstrate that vibrational energy levels are determined by frequencies of the measured beat signals. Benzene dimer, trimer, and NO-Ar cluster are chosen as sample gases. For benzene clusters, new vibrational bands are found by this method. For NO-Ar cluster, observed vibrational bands have agreement with calculated ones. However, bands over 20cm-1 are not agreement among experiment and calculation. The fact shows that the PES has to be modified. In summary, we succeeded in developing the new vibrational spectroscopy and observing the new vibrational bands.

Research Products

• [Journal Article] (2011)
  • Author(s): Daeyul Baek, Hirokazu Hasegawa, Yasuhiro Ohshima
  • Journal Title: J.Chem.Phys. AIP 134 Pages: 224302-224302
  • Peer Reviewed
• [Journal Article] (2011)
  • Author(s): Y.Khodorkovsky, K.Kitano, H.Hasegawa, Y.Ohshima, I.Averbukh
  • Journal Title: Phys.Rev.A APS 83 Pages: 23423-23423
  • Peer Reviewed
• [Journal Article] Controlling the sense of molecular rotation : Classical versus quantum analysis (2011)
  • Author(s): Y.Khodorkovsky, K.Kitano, H.Hasegawa, Y.Ohshima, I.Averbukh
  • Journal Title: Physical Review A Volume: 83
  • Peer Reviewed
• [Journal Article] (2010)
  • Author(s): Yasuhiro Ohshima, Hirokazu Hasegawa
  • Journal Title: Int.Rev.Phys.Chem. Taylor&Francis 29 Pages: 619-619
  • Peer Reviewed
• [Journal Article] (2010)
  • Author(s): R.Itakura, H.Hasegawa, Y.Kurosaki, A.Yokoyama, Y.Ohshima
  • Journal Title: J.Phys.Chem.A ACS 114 Pages: 11202-11202
  • Peer Reviewed
• [Journal Article] Coherent rotational excitation by intense nonresonant laser fields (2010)
  • Author(s): Y.Ohshima, H.Hasegawa
  • Journal Title: Internatinal Reviews in Physical Chemistry Volume: 29 Pages: 619-663
  • Peer Reviewed
• [Journal Article] Coherent correlation between nonadiabatic rotational excitation and angle-dependent ionization of NO in intense laser fields (2010)
  • Author(s): R.Itakura, H.Hasegawa, Y.Kurosaki, A.Yokoyama, Y.Ohshima
  • Journal Title: Journal of Physical Chemistry A Volume: 114 Pages: 11202-11209
  • Peer Reviewed
• [Presentation] Ultrafast rotational/vibrational motion of NO and NO/Ar in the electronic ground state induced by intense femtosecond laser (2010)
  • Author(s): Hirokazu Hasegawa, Yasuhiro Ohshima
  • Organizer: PACIFICHEM2010
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2010-12-15
• [Presentation] Ultrafast rotational/vibrational motion of NO and NO/Ar in the electronic ground state induced by intense femtosecond laser (2010)
  • Author(s): H.Hasegawa, Y.Ohshima
  • Organizer: PACIFICHEM 2010
  • Place of Presentation: Hawaii, USA Sheraton Waikiki hotel
  • Year and Date: 2010-12-15
• [Presentation] 高強度短パルス光によるNO-Arクラスターの分子間振動波束ダイナミクス (2010)
  • Author(s): 長谷川宗良、大島康裕
  • Organizer: 第4回分子科学討論会
  • Place of Presentation: 大阪
  • Year and Date: 2010-09-14
• [Presentation] 高強度短パルス光によるNO-Arクラスターの分子間振動波束ダイナミクス (2010)
  • Author(s): 長谷川宗良、大島康裕
  • Organizer: 第4回分子科学討論会
  • Place of Presentation: 大阪,大阪大学豊中キャンパス
  • Year and Date: 2010-09-14
• [Presentation] Coherent excitation of intermolecular vibration in NO-Ar by a nonresonant intense femtosecond laser pulse (2010)
  • Author(s): Hirokazu Hasegawa, Yasuhiro Ohshima
  • Organizer: Molecular & Ionic Cluster conference
  • Place of Presentation: Niigata
  • Year and Date: 2010-09-09
• [Presentation] Coherent excitation of intermolecular vibration in NO-Ar by a nonresonant intense femtosecond laser pulse (2010)
  • Author(s): H.Hasegawa, Y.Ohshima
  • Organizer: Molecular & ionic cluster conference
  • Place of Presentation: 新潟,当間高原リゾートホテル
  • Year and Date: 2010-09-09
• [Presentation] Coherent molecular rotational and vibrational dynamics induced by non resonant intense short laser pulses (2009)
  • Author(s): 長谷川宗良、大島康裕
  • Organizer: The 4th winter school of Asian core program
  • Place of Presentation: Seoul Natinal University, Seoul, Korea
• [Presentation] 高強度超短パルス光による非断熱振動・回転励起の測定に向けた装置開発 (2009)
  • Author(s): 長谷川宗良、大島康裕
  • Organizer: エクストリームフォトニクス研究会(第10回)
  • Place of Presentation: 蒲郡、ホテル竹島
• [Remarks] ホームページ等