中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1463-1468.doi: 10.1088/1674-1056/18/4/029

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Ultrafast multiplex CARS investigation of vibrational characteristics in chloroform and PMMA

王英惠, 彭亚晶, 何兴, 宋云飞, 杨延强   

  1. Center for Condensed Matter Science and Technology, Department of Physics,Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2008-06-03 修回日期:2008-07-14 出版日期:2009-04-20 发布日期:2009-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60478015 and 20573028).

Ultrafast multiplex CARS investigation of vibrational characteristics in chloroform and PMMA

Wang Ying-Hui(王英惠), Peng Ya-Jing(彭亚晶), He Xing(何兴), Song Yun-Fei(宋云飞), and Yang Yan-Qiang(杨延强)†   

  1. Center for Condensed Matter Science and Technology, Department of Physics,Harbin Institute of Technology, Harbin 150001, China
  • Received:2008-06-03 Revised:2008-07-14 Online:2009-04-20 Published:2009-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60478015 and 20573028).

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摘要： This paper demonstrates the femtosecond time-resolved coherent anti-Stokes Raman scattering by using folded BOXCARS geometry where an ultrashort broadband coherent white light continuum was used as Stokes pulse, and carries out the non-contact detection at long distance. The CARS signal is so easy to be detected that it can be seen even by nude eye. The C--H bonds of chloroform or PMMA were detected and the vibration modes belonging to the side chain and the main chain in PMMA were also compared. Their vibrational characteristics involved decay process and quantum beating were discussed. This modified CARS experimental technique could make up the deficiency of traditional CARS technique.

Abstract: This paper demonstrates the femtosecond time-resolved coherent anti-Stokes Raman scattering by using folded BOXCARS geometry where an ultrashort broadband coherent white light continuum was used as Stokes pulse, and carries out the non-contact detection at long distance. The CARS signal is so easy to be detected that it can be seen even by nude eye. The C--H bonds of chloroform or PMMA were detected and the vibration modes belonging to the side chain and the main chain in PMMA were also compared. Their vibrational characteristics involved decay process and quantum beating were discussed. This modified CARS experimental technique could make up the deficiency of traditional CARS technique.

Key words: femtosecond, ultrafast, CARS, vibrational characteristics

中图分类号:  (Vibrational analysis)

  • 33.20.Tp
33.20.Fb (Raman and Rayleigh spectra (including optical scattering) ?) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 33.15.Fm (Bond strengths, dissociation energies) 42.65.Dr (Stimulated Raman scattering; CARS) 33.80.-b (Photon interactions with molecules)