Optical Models of Graphene for the Study of Graphene-Based Fiber and Waveguide Devices

Graphene possesses many excellent optical properties and can be integrated with various photonic devices to achieve new functions. Three optical models of graphene appear in the literature: the isotropic model, the anisotropic model, and the interface model. In the isotropic/anisotropic model, graphene is treated as a thin film with a finite thickness that has an isotropic/anisotropic relative permittivity, whereas in the interface model, graphene is treated as a conductive boundary with no thickness. This talk presents a comparison of these models for the analysis of graphene-attached fiber/waveguide structures and an introduction of some graphene-incorporated fiber/waveguide devices developed at CityU.