Femtosecond infrared pump - stimulated Raman probe spectroscopy: the method and its first application to study vibrational relaxation pathway in liquid water

We apply femtosecond-infrared pump- stimulated Raman probe spectroscopy (fs-IR-SRS) which provides sub-100 fs time resolution, spectral resolution better than 10 cm(-1) and the 100 cm(-1) to 4000 cm(-1) probe bandwidth to study vibrational relaxation pathway after vibrational excitation of OH stretching mode in HDO in the system composed of 30 % of HDO in D2O.