中国物理B ›› 2012, Vol. 21 ›› Issue (3): 34210-034210.doi: 10.1088/1674-1056/21/3/034210

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杜鑫1 2,何兴1,刘玉强1,王英惠1,杨延强1   

  • 收稿日期:2011-09-14 修回日期:2011-10-11 出版日期:2012-02-15 发布日期:2012-02-15
  • 通讯作者: 杨延强,yqyang@hit.edu.cn E-mail:yqyang@hit.edu.cn

Coherent coupling between vibrational modes of C–H bonds at different positions studied by femtosecond time-resolved coherent anti-Stokes Raman scattering

Du Xin(杜鑫)a)b), He Xing(何兴)a), Liu Yu-Qiang(刘玉强)a), Wang Ying-Hui(王英惠)a), and Yang Yan-Qiang(杨延强)a)†   

  1. a. Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150080, China;
    b. College of Foundation Science, Harbin University of Commerce, Harbin 150028, China
  • Received:2011-09-14 Revised:2011-10-11 Online:2012-02-15 Published:2012-02-15
  • Contact: Yang Yan-Qiang,yqyang@hit.edu.cn E-mail:yqyang@hit.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 20573028 and 20973050).

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Abstract: We performed femtosecond time-resolved coherent anti-Stokes Raman scattering (fs-CARS) measurements on liquid toluene and PVK film. For both samples, we selectively excited the CH stretching vibrational modes and observed the expected quantum beat signals. The frequency of the well-defined beats is in good agreement with the energy difference between the two simultaneously excited modes, which demonstrates that a coherent coupling between the vibrational modes of the C-H chemical bonds exists at the different positions of the molecules. The dephasing times of the excited modes are obtained simultaneously.

Key words: femtosecond time-resolved coherent anti-Stokes Raman scattering, coherent coupling, quantum beat

中图分类号:  (Stimulated Raman scattering; CARS)

  • 42.65.Dr
42.50.Md (Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency) 78.47.J- (Ultrafast spectroscopy (<1 psec)) 78.47.je (Time resolved light scattering spectroscopy)