Center for Relativistic Laser Science

124th Summer Symposium of KCS-Physical Chemistry Division

Unlike spontaneous Raman effect, stimulated Raman scattering (SRS) generates fields allowing Raman signals from individual scatterers to add up into a highly directional, high-brightness coherent beam. However, in our experiment, we have performed a stimulated Raman loss (SRL) spectroscopy experiment of several organic solvents with an intense Raman pump beam and observed significant line shape changes in their spectra. The experimental results are compared with theoretical simulation by numerically solving the third order susceptibility. These results show that nonlinear effects such as cross-phase modulation (XPM), self-phase modulation (SPM) can be included in SRS signals with intense Raman pump pulse. It will be presented to discuss the characteristic dispersion-shaped SRL signals related to XPM.

References

[1] K. Ekvall; P. van der Meulen; C. Dhollande; L.-E. BergS. Pommeret; R. Naskrecki; J.-C. Mialocq. Cross phase modulation artifact in liquid phase transient absorption spectroscopy. J. Appl. Phys. 2000. 87, 2340-2352.

[2] Seung Min Jin; Young Jong Lee; Jongwan Yu; Seong Keun Kim. Development of femtosecond stimulated Raman spectroscopy: Stimulated Raman gain via elimination of cross phase modulation. Bull. Korean Chem. Soc. 2004. 25, 1829-1832.