Light storage via coherent population oscillation in a thermal cesium vapor

TL;DR

This paper demonstrates a room-temperature light storage method using Coherent Population Oscillation in cesium vapor, showing insensitivity to magnetic inhomogeneities and a lifetime limited by atomic motion.

Contribution

It introduces a novel CPO-based light storage technique in cesium vapor that is robust against magnetic field inhomogeneities and matches theoretical predictions.

Findings

CPO-based memory is insensitive to magnetic field inhomogeneities

Storage lifetime is mainly limited by atomic motion

Theoretical simulations agree well with experimental results

Abstract

We report on the storage of light via the phenomenon of Coherent Population Oscillation (CPO) in an atomic cesium vapor at room temperature. In the experiment the optical information of a probe field is stored in the CPO of two ground states of a Lambda three-level system formed by the Zeeman sublevels of the hyperfine transition F = 3 - F' = 2 of cesium D2 line. We show directly that this CPO based memory is very insensitive to stray magnetic field inhomogeneities and presents a lifetime which is mainly limited only by atomic motion. A theoretical simulation of the measured spectra was also developed and is in very good agreement with the experiment.