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.
Received: 03 June 2008
Revised: 14 July 2008
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 60478015 and
20573028).
Cite this article:
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) Ultrafast multiplex CARS investigation of vibrational characteristics in chloroform and PMMA 2009 Chin. Phys. B 18 1463
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