Optical control of Faraday rotation in hot Rb vapor

TL;DR

This paper demonstrates a method to achieve large, controlled polarization rotation of light in hot Rb vapor with minimal loss, enabling advanced manipulation of classical and quantum optical signals.

Contribution

It introduces a technique for optical control of Faraday rotation with high phase shift and low absorption in hot Rb vapor, suitable for quantum and classical light processing.

Findings

Achieved polarization rotations greater than pi/2 radians.

Transmission maintained at 95%, indicating low loss.

Phase shift to absorption ratio of 40 pi.

Abstract

We demonstrate controlled polarization rotation of an optical field conditional on the presence of a second field. Induced rotations of greater than pi/2 rad are seen with a transmission of 95%, corresponding to a ratio of phase shift to absorption of 40 pi. This combination of large, controlled rotation and low loss is well-suited for the manipulation of both classical and quantum light pulses.