Propagation of two short laser pulse trains in a $\Lambda$-type three-level medium under conditions of electromagnetically induced transparency

TL;DR

This paper studies how short laser pulse trains propagate through a three-level medium under electromagnetically induced transparency, analyzing effects of pulse parameters on transparency and dark state formation.

Contribution

It introduces a numerical analysis of pulse train propagation in a three-level medium, extending understanding beyond single pulses to train dynamics under EIT conditions.

Findings

Pulse train parameters significantly affect EIT conditions.

Dark state formation depends on pulse area, number, and detuning.

Propagation dynamics differ from single-pulse cases.

Abstract

We investigate the dynamics of a pair of short laser pulse trains propagating in a medium consisting of three-level $\Lambda$-type atoms by numerically solving the Maxwell-Schr\"odinger equations for atoms and fields. By performing propagation calculations with different parameters, under conditions of electromagnetically induced transparency, we compare the propagation dynamics by a single pair of probe and coupling laser pulses and by probe and coupling laser pulse trains. We discuss the influence of the coupling pulse area, number of pulses, and detunings on the probe laser propagation and realization of electromagnetically induced transparency conditions, as well on the formation of a dark state.