Principles Of Nonlinear Optical Spectroscopy A Practical Approach Or Mukamel For Dummies 2021 File

Realize that the signal you measure is just the "memory" of the molecule responding to the history of the light pulses.

Let’s do a thought experiment. You have a molecule with two vibrations: A (C=O stretch) and B (C-H bend). They talk to each other (coupling). Realize that the signal you measure is just

The response function

After Fourier transforms over ( \tau ) and the detection time, you get a : one axis is the initial frequency (Pulse 1), the other is the final frequency (Pulse 3). Peaks tell you which vibrations are connected. Realize that the signal you measure is just