Metal nanostructured materials have generated considerable interest owing to ultrafast response and large nonlinearity in plasmonics. This research is aimed to clarify the spectral dependence of χ(3), which is strongly influenced by the geometries and materials. Thin films and spherical nanoparticles of Au, Ag and TiN were fabricated. Particularly, Ag nanoparticles were fabricated with sizes ranging from 3 to 16 nm for size quantization. Triangular plates, nanorods and nanobipyramids of Au nanoparticles were synthesized for geometry influence. All the nanoparticles were embedded in PVA (Au, TiN) or SiO2 substrate for further characterization. χ(3) was evaluated by a combined analysis of spectroscopic ellipsometry and pump probe spectroscopy.

© 2019 Japan Society of Applied Physics, The Optical Society (OSA)

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