TRANSIENT 4-WAVE-MIXING LINE-SHAPES - EFFECTS OF EXCITATION-INDUCED DEPHASING

We describe the transient four-wave-mixing (FWM) response in systems where decay of the optically induced coherence depends on the excitation level of the system. Using modified optical Bloch equations, we show that excitation-induced dephasing due to phase-interrupting excited-state interactions qualitatively modifies the temporal behavior and polarization dependence of the FWM signal.