Incorporation of highly dispersed gold nanoparticles into the pore channels of mesoporous silica thin films and their ultrafast nonlinear optical response

The development of a facile and flexible strategy to incorporate uniformly and highly dispersed gold nanoparticles into the channels of mesoporous thin films (MTF) was discussed. The gold precursors of HAuCl₄ was effectively introduced into the pore channels using a surface-modification scheme. The prepared composite films demonstrated an ultrafast NLO response and enhanced third-order NLO susceptibility. The femtosecond optical Kerr effect (OKE) response of the MTF embedded with gold nanoparticles was also elaborated.