Effect of pulse propagation on the two-dimensional photon echo spectrum of multilevel systems
A perturbative method was used to investigate the effect of propagation on multilevel systems, specifically on the relative intensity and profile of the cross peaks. It was shown that both the peak profiles and the relative intensity of the peaks in a 2D spectrum change as the pulse propagates through the sample. The behavior of the peaks was found to be counterintuitive, and depends not only on the optical density, but also on the dynamics of the system.
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