“…Time-scanning the visible pulse against the initial IR pulse generates the SFG-VS signal in the time domain, obtaining the time evolution of the vibrational polarization through the so-called SFG-FID process. So far, there have been SFG-FID studies on the dephasing dynamics of many different interfacial vibrations, such as CO adsorbates at metal interfaces, − −CN and −CH stretches of the Langmuir–Blodgett monolayers at air/water interface, air/solid interfaces, , −CH and −CN stretch vibrations at metal–liquid interface, −CH stretches of self-assembling monolayers (SAMs), − modified graphene samples, −CH and −CN stretch vibrations at liquid/solid interface, -OD and −OH stretches at the liquid/solid interface, − and −CH, CC– stretching vibrations at the air/liquid interface. , From these examples, one can see that SFG-FID has been used for systems with relatively simple vibrational spectra, since the time-resolved data for systems with complicated and congested vibrational bands usually generate less information on the vibrational coherences than that with spectral analysis of high-resolution BB-SFG-VS …”