Fig. 3.

Comparison of vibrational frequencies. (A) Discrete Fourier transform of the 39th harmonic emission from Fig. 1, showing the three Raman-active modes of SF₆ that are excited by our ISRS pump pulse. (B) Stimulated anti-Stokes Raman scattering of a 400-fs probe pulse centered at 400 nm from SF₆, after excitation by the same ISRS pump pulse used to excite vibrations in Fig. 1. (C) Discrete Fourier transform of the harmonic emission data from Fig. 1 for 0.3-ps time intervals centered at different times after the pump pulse (0.45, 0.75, and 1.05 ps).