유도 라만 산란 분광기의 제작과 C_6H_6과 C_6D_6의 유도 라만 스펙트럼 측정 = Development of Stimulated Raman Scattering spectrometer and measurement of Stimulated Raman spectra of C_6H_6 and C_6D_6

다국어 초록 (Multilingual Abstract)

In this study, we constructed a nonlinear Raman Laser spectrometer and analyzed the potential applicability of this apparatus by experimenting the stimulated Raman specrtoscopy which is one of the nonlinear Raman spectroscopy. For the case of stimulated Raman scattering, the interaction between a strong pump laser and a molecule leads to an energy exchange between pump beam and Stokes or anti-Stokes beams which may result in a strong, directional output of the Raman beams.
Stimulated Raman spectra of C_6H_6 and C_6D_6 are obtained. For the case of C_6H_6, stimulate Raman scaterring generate eight beams from Rayleigh beam (ν_0) in the center to the 4th Stokes beam(ν_0 + 3ν_2), where ν_2 is the ring breathing mode of benzene of 992cm^-1. The line intensity of first Stokes beam is about 30∼40% of pump beam. Therefore, the resulting Stokes efficiency including second and third Stokes is about 40∼50% of pump beam. Similar results are obtained for C_6D_6. Finally, we found taht the Raman cross section of ν_2 mode of C_6D_6 is larger than that of C_6H_6.