Abstract
Optical second harmonic generation (SHG) was explored in the LiB3O5 (LBO):Nd3+/polymer nanocomposites with incorporated Au nanoparticles deposited on the transparent ITO electrodes. It was established that the sizes of the NP play a crucial role in the output SHG. The output SHG was very sensitive to the Nd3+ content and demonstrated its maximum at 1.75 % in weighting units. Additionally it was found substantial dependence of the time delay between the output SHG and the fundamental beam maximum on the output SHG efficiency. This behaviour is explained by the localized surface plasmonic waves in the nano-surfaces of the Au NP effectively interacting with the nano-trapping levels of the LBO nanointerfaces. The possible mechanisms responsible for the SHG origin are discussed.
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