Third-order nonlinear properties of a silica niobate nanocomposite

نویسندگان

  • E. L. Falcão Filho
  • C. A. C. Bosco
  • G. S. Maciel
  • L. H. Acioli
  • Cid B. de Araújo
  • A. A. Lipovskii
چکیده

We have investigated the third-order nonlinear optical response of a glass-ceramic containing sodium niobate (NaNbO3) nanocrystals using picosecond Z-scan and femtosecond optical Kerr gate techniques at 1064 nm and 800 nm, respectively. The results show a large dependence of the nonlinear refraction index (n2) on the volume fraction of NaNbO3 crystallites. Nonlinear absorption is negligible for all samples and the response time of the nonlinearity was shorter than 100fs demonstrating that this material is a promising candidate for ultrafast optical switching.

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تاریخ انتشار 2003