Graphene fabrication and graphene doping for optical applications

Abstract

Graphene, a bidimensional hexagonal lattice of carbon atoms, is a new material that has attracted physicists, chemists and engineers attentions, due to its remarkable properties. Graphene is pointed as the basis for the new generation electronics, with high-mobility electron transport and compatibility with optical and optoelectronic devices.Graphene is also a broadband absorber, due to its gapless linear Dirac-like electrons dispersion. It can be used as saturable absorber in rare-earth doped fiber lasers, enabling ultrashort pulse generation, in the femtosecond regime. Laser generating such ultrashort pulses can be applied to telecommunications WDM systems.For optical and electronic applications, graphene fabrication is a key point. Monolayer and bilayer graphene can be fabricated by CVD (Chemical Vapor Deposition) methods on Cu/SiO2 substrates. Also by CVD, graphene can be doped for Fermi-level tuning. It has direct implication on material energy gap and absorption spectrum.This project proposes the study of graphene fabrication and doping , in order to investigate materials optical properties. Optical applications in Mode-locked Erbium-doped fiber lasers are proposed. (AU)