Third-order optical nonlinearities of Ag nanoparticles fabricated by two-step ion exchange in glass

J. Rönn; L. Karvonen; S. Kujala; A. Säynätjoki; A. Tervonen; S. Honkanen

doi:10.1117/12.922224

16 May 2012 Third-order optical nonlinearities of Ag nanoparticles fabricated by two-step ion exchange in glass

J. Rönn, L. Karvonen, S. Kujala, A. Säynätjoki, A. Tervonen, S. Honkanen

Proceedings Volume 8434, Nonlinear Optics and Applications VI; 84341K (2012) https://doi.org/10.1117/12.922224
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

We present third-order optical nonlinearities of Ag nanoparticles fabricated using a two-step ion exchange method. The nonlinearities are studied using the well-known Z-scan technique. In our experiments, we use a Ti-Sapphire laser source operating at 800 nm, which is far from the resonance of the Ag nanoparticles. The nonlinear refraction of these nanoparticles is studied using the closed aperture configuration of the Z-scan method. Contrary to expectations from previous studies for similar-sized nanoparticles, our nanoparticles possess positive nonlinear refractive index. The estimated nonlinear refractive indices are in the range of 10^-12 cm²/W.

Citation Download Citation

J. Rönn, L. Karvonen, S. Kujala, A. Säynätjoki, A. Tervonen, and S. Honkanen "Third-order optical nonlinearities of Ag nanoparticles fabricated by two-step ion exchange in glass", Proc. SPIE 8434, Nonlinear Optics and Applications VI, 84341K (16 May 2012); https://doi.org/10.1117/12.922224

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