Energy correlations of photon pairs generated by a silicon microring resonator probed by Stimulated Four Wave Mixing

TL;DR

This paper demonstrates a method to efficiently analyze the energy correlations of photon pairs generated in silicon microring resonators by using stimulated four-wave mixing, enabling high-resolution and rapid performance monitoring.

Contribution

It introduces a stimulated four-wave mixing technique to reconstruct joint spectral density, improving spectral resolution and measurement speed for integrated quantum photonic devices.

Findings

Able to distinguish between uncorrelated and highly-correlated photon pairs

Provides a fast and high-resolution alternative to coincidence measurements

Enhances monitoring of silicon micro-ring resonator performance

Abstract

Compact silicon integrated devices, such as micro-ring resonators, have recently been demonstrated as efficient sources of quantum correlated photon pairs. The mass production of integrated devices demands the implementation of fast and reliable techniques to monitor the device performances. In the case of time-energy correlations, this is particularly challenging, as it requires high spectral resolution that is not currently achievable in coincidence measurements. Here we reconstruct the joint spectral density of photons pairs generated by spontaneous four-wave mixing in a silicon ring resonator by studying the corresponding stimulated process, namely stimulated four wave mixing. We show that this approach, featuring high spectral resolution and short measurement times, allows one to discriminate between nearly-uncorrelated and highly-correlated photon pairs.