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SnO2 nanoparticles in silica: nanosized tools for femtosecond-laser machining of refractive index patterns

By A. Paleari, E. Franchina, N. Chiodini, A. Lauria, E. Bricchi and P.G. Kazansky


We show that SnO2 nanoclusters in silica interact with ultrashort infrared laser pulses focused inside the material generating a hydrostatic compression and photoelastic response of the surrounding glass. This effect, together with the laser-induced nanocluster amorphization, gives rise to positive or negative refractive-index changes, up to 10–2, depending on the beam-power density. This result points out a wide tuning of the refractive index patterns obtainable in silica-based optical technology

Topics: TK, QC
Year: 2006
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Provided by: e-Prints Soton

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