Volume 94, Number 3, May 2011
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||28 April 2011|
Observation of asymmetric spectrum broadening induced by silver nanoparticles in a heavy-metal oxide glass
Max-Born-Institut for Nonlinear Optics and Short Pulse Spectroscopy - Max-Born-Str. 2a, D-12489 Berlin, Germany, EU
2 Institut fur Physik, Universitat Rostock - Universitatsplatz 3, D-18055 Rostock, Germany, EU
3 Jerusalem College of Engineering - Ramat Beit HaKerem, POB 3566, Jerusalem, 91035, Israel
4 LAVIE, Department of Chemistry, UFSCar - Rodovia Washington Luiz Km 235, 13565-905, São Carlos, SP, Brazil
5 Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, Tel Aviv University Tel Aviv 69978, Israel
Accepted: 30 March 2011
We demonstrate experimentally and support by a theoretical analysis an effect of asymmetric spectrum broadening, which results from doping of silver nanoparticles into a heavy-glass matrix, 90(0.5WO3-0.3SbPO4-0.2PbO)-10AgCl. The strong dispersion of the effective nonlinear coefficient of the composite significantly influences the spectral broadening via the self-phase modulation, and leads to a blue upshift of the spectrum. Further extension of the spectrum towards shorter wavelengths is suppressed by a growing loss caused by the plasmon resonance in the silver particles. The red-edge spectral broadening is dominated by the stimulated Raman scattering.
PACS: 78.67.Sc – Nanoaggregates; nanocomposites / 42.65.Sf – Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics
© EPLA, 2011
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