Direct observation of anharmonic coupling in the time domain with femtosecond stimulated Raman scattering.
Off-resonant impulsive Raman excitation is used to initiate nonstationary nuclear motion in low-frequency vibrational modes of deuterio-chloroform. Femtosecond time-resolved stimulated Raman probing of the high-frequency C-D stretch reveals additional vibrational sidebands that arise as a result of anharmonic coupling between the impulsively excited low-frequency and the probed high-frequency vibrations. These experiments illustrate the detailed molecular information on anharmonic and reactive surfaces available from multidimensional femtosecond stimulated Raman techniques.
Kukura
Philipp
P
Department of Chemistry, University of California, Berkeley, California 94720, USA.
Frontiera
Renee
R
Mathies
Richard A
RA
D000465:Algorithms; D002725:Chloroform / Q000032:analysis / Q000737:chemistry*; D003198:Computer Simulation; D008027:Light; D008956:Models, Chemical; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013997:Time Factors
D002725:Chloroform