Abstract
Over the last years supercontinuum (SC) generation in micro structure fibers [1] has attracted great interest. This coherent white-light source using low energy fs and ps pulses is applied in physics, chemistry, biology, and medicine using numerous methods. Recently much effort has been paid to develop low-threshold SC broadband light sources by using highly nonlinear nanowires [2]. In the present contribution we study an alternative concept by using silver- nanoparticles composites, exhibiting an intrinsically high nonlinear coefficient. Far from the plasmon resonance, this coefficient is about seven orders of magnitude higher than in fused silica. Since the local electric field in metal nanoparticles is enhanced at the plasmonic resonance, the metal nonlinear response can be additionally significantly enlarged as the wavelength shifts towards this resonance.
© 2009 IEEE
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