Linear and nonlinear optical properties of gold nanoparticle-doped photonic crystal fiber

In this work, we propose to combine the benefit of the PCF geometry to the increased nonlinearity induced by Au-NPs to realize nonlinear silica fibers. In order to reach this goal, an alternative approach has been developed for fiber manufacturing, based on the coupling of glass rod synthesis by a soft technique (namely the Sol-Gel route) and its use as core material for the realization of a PCF by Stack and Draw. The crucial question of the preservation of Au NPs at the different steps of the process, up to the fiber geometry, is studied as well as the optical properties of the final fiber for which the surface plasmon resonance related to Au NPs is observed around 520 nm.