Graphene oxide films for applications to ultra-flat optics and linear and nonlinear integrated photonic chips

Abstract

With superior optical properties, high flexibility in engineering its material properties, andstrong capability for large-scale on-chip integration, graphene oxide (GO) is an attractivesolution for on-chip integration of two-dimensional (2D) materials to implement functionalintegrated photonic devices capable of new features. Over the past decade, integrated GOphotonics, representing an innovative merging of integrated photonic devices and thin GOfilms, has experienced significant development, leading to a surge in many applicationscovering almost every field of optical sciences. This paper reviews the recent advances in thisemerging field, providing an overview of the optical properties of GO as well as methods forthe on-chip integration of GO. The main achievements made in GO hybrid integratedphotonic devices for diverse applications are summarized. The open challenges as well as thepotential for future improvement are also discussed.