Graphene oxide for high performance nonlinear optics in integrated nanowires

TL;DR

This paper demonstrates that integrating graphene oxide films with nanophotonic chips significantly enhances their nonlinear optical performance, especially in silicon platforms, due to GO's high Kerr nonlinearity and low absorption.

Contribution

It introduces the use of graphene oxide films to boost nonlinear effects in integrated nanophotonic devices across various platforms.

Findings

Up to 20-fold increase in Kerr nonlinearity in silicon.

Significant enhancement of third-order nonlinear processes.

Low nonlinear absorption in GO films enables high performance.

Abstract

We report enhanced nonlinear optics in integrated nanophotonic chips through the use of integrated with 2D graphene oxide (GO) films. We investigate nanophotonic platforms including silicon, silicon nitride and high index doped silica. Due to the high Kerr nonlinearity of GO films and low nonlinear absorption we observe significant enhancement of third-order nonlinear processes. In particular, in silicon we observe an increase in both the Kerr nonlinearity and nonlinear figure of merit of up to 20 times. These results show the strong capability of GO films for improving the nonlinear optical performance of integrated photonic devices.