Figure 3
Contraction of the C–C bond after laser excitation: the multi-pulse signal in r space. The C–C bond contracts from the single bond length (1.5 Å) to the triple bond length (1.2 Å). The process is supposed to be accomplished in 100 fs. (a) The signal ΔS(r,τ) in the absence of pump–probe time delay dispersion and (b) in its presence (1000 fs). The contraction of the C–C bond is clearly visible in (a) but not in (b). |