Enhanced four-wave mixing via crossover resonance in cesium vapor

TL;DR

This paper demonstrates enhanced four-wave mixing in cesium vapor through crossover resonance, enabling control over intensity correlations using a single laser frequency in a Doppler-broadened medium.

Contribution

It introduces a novel method to enhance four-wave mixing via crossover resonance in cesium vapor with a simple theoretical model.

Findings

Enhanced four-wave mixing observed at specific velocity classes.

Ability to generate correlated and anti-correlated probe and conjugate beams.

Qualitative agreement between experimental results and the theoretical model.

Abstract

We report on the observation of enhanced four-wave mixing via crossover resonance in a Doppler broadened cesium vapor. Using a single laser frequency, a resonant parametric process in a double-$\Lambda$ level configuration is directly excited for a specific velocity class. We investigate this process in different saturation regimes and demonstrate the possibility of generating intensity correlation and anti-correlation between the probe and conjugate beams. A simple theoretical model is developed that accounts qualitatively well to the observed results.