Design analysis of 2D graphene oxide films integrated with microring
resonators for FWM
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.