Nonperturbative Transient Four-Wave-Mixing Lineshapes Due to Excitation induced Shift and Excitation Induced Dephasing
J M. Shacklette, Steven T. Cundiff
We numerically calculate the transient-four-wave-mixing (TFWM) response in systems that exhibit either aresonance'frequency or a dephasing rate that depends on the excitation level, which can occur in semiconductors or a dense atomic vapor. These effects change the intensity dependence of the TFWM signal, cuasing it to display non-cubic behavior for significantly lower pulse areas and even a reduction in signal intensity for increasing pluse area. They also qualitatively change both the temporal behavior and spectrum of the TFWM signal in ways that cannot adequately be described in perturbation theory. For time-integrated TFWM, the saturation behavior is also found to depend on the delay. For compariosn, the effects of local fields are also calculated. These results can help provide discrimination amongst the various phenomena.
Journal of the Optical Society of America B-Optical Physics
and Cundiff, S.
Nonperturbative Transient Four-Wave-Mixing Lineshapes Due to Excitation induced Shift and Excitation Induced Dephasing, Journal of the Optical Society of America B-Optical Physics
(Accessed February 29, 2024)