In this work, we demonstrate significantly enhanced nonlinear four‐wave mixing (FWM) in complementary‐metal‐oxide‐semiconductor compatible micro‐ring resonators integrated with 2D layered graphene oxide (GO) films. Four‐wave‐mixing (FWM) measurements for different pump powers and resonant wavelengths show a significant improvement in efficiency of ≈7.6 dB for a uniformly coated device with 1 GO layer and ≈10.3 dB for a patterned device with 50 GO layers. The measurements agree well with theory, with the enhancement in FWM efficiency resulting from the high Kerr nonlinearity and low loss of the GO films combined with the strong light–matter interaction within the MRRs. The dependence of GO's third‐order nonlinearity on layer number and pump power is also extracted from the FWM measurements, revealing interesting physical insights about the evolution of the GO films from 2D monolayers to quasi bulk‐like behavior. These results confirm the high nonlinear optical performance of integrated photonic resonators incorporated with 2D layered GO films.
Read more at Small:
https://onlinelibrary.wiley.com/doi/full/10.1002/smll.201906563
The work is featured on the cover of the Volume 16 of Small:
https://onlinelibrary.wiley.com/doi/abs/10.1002/smll.202070085
23 Apr 2020