Ultrafast multiplex CARS investigation of vibrational characteristics in chloroform and PMMA

作者：Wang Ying-Hui; Peng Ya-Jing; He Xing; Song Yun-Fei; Yang Yan-Qiang^*

来源：Chinese Physics B, 2009, 18(4): 1463-1468.

DOI：10.1088/1674-1056/18/4/029

• femtosecond
• ultrafast
• CARS
• vibrational characteristics

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.

• 出版日期2009-4
• 单位哈尔滨工业大学