Design of microring resonators integrated with 2D graphene oxide films for four-wave mixing

TL;DR

This paper theoretically analyzes and optimizes four-wave mixing in microring resonators integrated with graphene oxide films, achieving significant efficiency enhancements through parameter tuning and highlighting the potential for improved nonlinear optical devices.

Contribution

It introduces a detailed theoretical framework for FWM in GO-coated MRRs and demonstrates optimized device parameters for maximum efficiency improvement.

Findings

Achieved ~18.6 dB FWM conversion efficiency enhancement.

Optimized device parameters for balancing nonlinearity and loss.

Provided insights into effects of GO film and MRR parameters on FWM performance.

Abstract

We theoretically investigate and optimize the performance of four-wave mixing (FWM) in microring resonators (MRRs) integrated with two-dimensional (2D) layered graphene oxide (GO) films. Owing to the interaction between the MRRs and the highly nonlinear GO films as well as to the resonant enhancement effect, the FWM efficiency in GO-coated MRRs can be significantly improved. Based on previous experiments, we perform detailed analysis for the influence of the GO film parameters and MRR coupling strength on the FWM conversion efficiency (CE) of the hybrid MRRs. By optimizing the device parameters to balance the trade-off between the Kerr nonlinearity and loss, we achieve a high CE enhancement of ~18.6 dB relative to the uncoated MRR, which is ~8.3 dB higher than previous experimental results. The influence of photo-thermal changes in the GO films as well as variations in the MRR parameters such as the ring radius and waveguide dispersion on the FWM performance is also discussed. These results highlight the significantly improved FWM performance that can be achieved in MRRs incorporating GO films and provide a guide for optimizing their FWM performance.