Time-dependent phase shift of a retrieved pulse in off-resonant EIT-based light storage

TL;DR

This paper investigates how the phase of a retrieved light pulse varies over time in off-resonant EIT-based storage, combining experimental measurements with numerical simulations to understand the effects of optical detuning.

Contribution

It provides the first detailed analysis of time-dependent phase shifts in off-resonant EIT storage using metastable helium vapor and dynamical Maxwell-Bloch equations.

Findings

Time-dependent phase shifts are influenced by optical detuning.

Numerical simulations accurately reproduce experimental phase dynamics.

Insights into phase behavior improve understanding of EIT-based light storage.

Abstract

We report measurements of the time-dependent phases of the leak and retrieved pulses obtained in EIT storage experiments with metastable helium vapor at room temperature. In particular, we investigate the influence of the optical detuning at two-photon resonance, and provide numerical simulations of the full dynamical Maxwell-Bloch equations, which allow us to account for the experimental results.