Chemical Physics Letters, Vol.485, No.1-3, 45-48, 2010
Vibration-selective coherent anti-Stokes Raman scattering with linearly chirped white-light pulses
A practical extension of selective excitation using broadband laser is reported. A specific molecular vibration is excited by stimulated Raman scattering induced by a pair of linearly chirped white-light pulses (650-900 nm). The white-light pulse is generated by. lamentation produced in a focused Ti:sapphire laser beam (similar to 30 fs, 1.8 mJ/pulse). The excited amplitude is probed by coherent anti-Stokes Raman scattering using the third pulse with a narrow bandwidth (769.9 +/- 1.5 nm). As a demonstration, the N-2 and O-2 molecules are respectively excited at different time intervals of the pulse pair without changing the wavelength region of the light source. (C) 2009 Elsevier B. V. All rights reserved.