Fig. 4: Different contributions to the ISRS signal can be resolved depending on how the data is windowed in the time domain, Δt.
From: Transient measurement of phononic states with covariance-based stochastic spectroscopy
a When selecting the negative time delays, the only contribution to the 2D spectrum is the 1:1 diagonal. When the pump–probe overlap is b partially and c fully excluded, the overlap diagonals are reduced and fully removed (respectively), leaving only discrete ISRS peaks. Horizontal lines indicate the frequency of known Raman modes of quartz.
