Matched Slow Pulses Using Double Electromagnetically Induced Transparency

TL;DR

This paper demonstrates double electromagnetically-induced transparency in rubidium vapor, enabling control over transparency contrast and group velocities of two signals, with potential to enhance nonlinear optical interactions.

Contribution

It introduces a novel double EIT scheme using a tripod energy level configuration in rubidium vapor, allowing precise control of optical properties.

Findings

Control over transparency window contrast

Equalization of group velocities of signal fields

Potential for enhanced nonlinear optical interactions

Abstract

We implement double electromagnetically-induced transparency (double EIT) in rubidium vapor, using a tripod-shaped energy level scheme consisting of hyperfine and magnetic sublevels of the 5S1/2 to 5P1/2 transition. We show experimentally that through the use of double EIT one can control the contrast of transparency windows as well as group velocities of the two signal fields. In particular, the group velocities can be equalized, which holds promise to greatly enhance nonlinear optical interaction between these fields.