Four-wave mixing enhanced white-light cavity

TL;DR

This paper investigates how four-wave mixing within a white-light cavity enhances its bandwidth by analyzing in-medium propagation dynamics and self-generated fields, revealing a counterintuitive bandwidth increase.

Contribution

It introduces a novel understanding of in-medium four-wave mixing effects that enhance white-light cavity bandwidth without sacrificing intensity buildup.

Findings

Self-generated fields via four-wave mixing occur within the medium.

In-medium dynamics lead to increased cavity bandwidth.

Enhanced bandwidth achieved without reducing maximum intensity.

Abstract

We discuss in-medium propagation dynamics in a white light cavity that leads to an enhancement of the cavity's bandwidth without reducing its maximum intensity buildup. We analyze the spatiotemporal dynamics of our system with a full simulation of the field propagation in a regime that leads to strong absorption of the control fields. We find that an additional coherent field is generated within the medium via four-wave mixing. This self-generated field leads to a backaction of the medium onto the probe field. Counter intuitively, this pronounced in-medium dynamics throughout the propagation leads to an additional enhancement of the cavity bandwidth.