NLO - 50 Years of Nonlinear Optics International Symposium location:Barcelona date:8 – 10 October 2012
The synthesis, characterization and application of noble metal nanoparticles is the subject of intense research, due to the promising characteristics of these nanoparticles for applications in optics, catalysis, electronics and metamaterials. Noble metal nanoparticles display interesting nonlinear optical properties. These properties are caused by their high density of free electrons and the associated surface plasmons. Second harmonic generation (SHG) has been used to characterize, amongst others, gold nanoparticles. Separately, SHG has been used to characterize the chirality of organic materials as well as metamaterials. However, no report has been made of the nonlinear optical characterization of chiral noble metal nanoparticles.
We report the SHG characterization of a nanocomposite of poly(methyl methacrylate) and chiral gold nanoparticles. Chirality is observed in the second harmonic generated light under correct polarization of incoming and detected light. These results demonstrate the ability of SHG to probe the chirality of noble metal nanoparticles. Further nonlinear optical characterization can improve the understanding of the origin of chirality in these nanoparticles.