Superluminal propagation: time-space pulses

Superluminal light propagation usually comes with high absorption, which can hinder its detection in practical samples. We suggest an all-optical approach using the two-photon resonance in three-level media to solve this issue.We operate in a far-detuned regime with minimal absorption, thus eliminating the usual requirements for population inversion, gain assistance, or nonlinear optical response.Our comprehensive analysis explores a wide range of parameters to identify conditions where significant pulse advancement is possible with high transmission levels. We introduce a figure of merit that balances the desired group-index values and transmission level, aiding in pinpointing the optimal characteristics of the dressing beam. Based on that figure of merit we calculated the exact propagations of pulses under different conditions, which are given in this dataset.