An analytical expression for the nonlinear refractive index of graphene has been derived and used to obtain the performance metrics of third order nonlinear devices using graphene as a nonlinear medium. None of the metrics is found to be superior to the existing nonlinear optical materials.
@article{arxiv.1402.3870,
title = {Graphene - a rather ordinary nonlinear optical material},
author = {Jacob B khurgin},
journal= {arXiv preprint arXiv:1402.3870},
year = {2015}
}