title: Measuring the nonlinear refractive index of graphene using the optical Kerr effect method.
abstract: By means of the ultrafast optical Kerr effect method coupled to optical heterodyne detection (OHD-OKE), we characterize the third-order nonlinear response of graphene and compare it to experimental values obtained by the Z-scan method on the same samples. From these measurements, we estimate a negative nonlinear refractive index for monolayer graphene, n2=-1.1×10-13m2/W. This is in contradiction to previously reported values, which leads us to compare our experimental measurements obtained by the OHD-OKE and the Z-scan method with theoretical and experimental values found in the literature and to discuss the discrepancies, taking into account parameters such as doping.
authors.forename: Evdokia
authors.initials: E
authors.lastname: Dremetsika
authors.forename: Bruno
authors.initials: B
authors.lastname: Dlubak
authors.forename: Simon-Pierre
authors.initials: SP
authors.lastname: Gorza
authors.forename: Charles
authors.initials: C
authors.lastname: Ciret
authors.forename: Marie-Blandine
authors.initials: MB
authors.lastname: Martin
authors.forename: Stephan
authors.initials: S
authors.lastname: Hofmann
authors.forename: Pierre
authors.initials: P
authors.lastname: Seneor
authors.forename: Daniel
authors.initials: D
authors.lastname: Dolfi
authors.forename: Serge
authors.initials: S
authors.lastname: Massar
authors.forename: Philippe
authors.initials: P
authors.lastname: Emplit
authors.forename: Pascal
authors.initials: P
authors.lastname: Kockaert