Vibrational vave-packet dynamics in CV670 investigated by broadband femtosecond TR-CARS spectroscopy

Broadband femtosecond time-resolved coherent anti-Stokes Raman scattering ((TR-CARS)) is utilized to investigate the wave-packet dynamics of Cresyl Violet (CV670) dye molecules in ethanol solvent at room temperature. An interesting behavior of wave-packet dynamics phenomena is observed and discussed for the first time, and several unknown Raman vibrational modes with frequency differences of 32 cm−1, 38 cm−1, 45 cm−1, 50 cm−1, 55 cm−1, 65 cm−1, 80 cm−1, 95 cm−1 and 101 cm−1 are excited and obtained at the same time. This work makes possible high efficiency in the structure investigation as well as dynamics of intra-molecular processes by broadband femtosecond (TR-CARS) spectroscopy with fast Fourier transformation (FFT) analysis means.