The current work presents practical study on improved second harmonicgeneration; SHG signal in individual ZnO NWs coated with gold nanoparticles., experiments on the growth of gold nanoparticles (Au NPs) onto zinc oxide nanowires(ZnO NWs) by several densities of gold nanoparticles coated are prepared via an impregnation simple method. The surface morphologies and the propagation manner of hybrid nanostructures the "TEM' was utilized to study the optical properties of samples nanostructures. The dark – field scattering microscopy was used to characterize single ZnO NW and confirm the coated of hybrid Au/ ZnO nanowires and characterize the density effect of the gold nano particles. By make a comparison between a single zinc oxide with and without gold nano particles coated, nonlinear experiment was studied through it, we got to the estimated improvement of second - harmonic generation signal about ~ 1.5 times, ~ 7 times, and ~ 7.5 times for low, moderate and full coated of gold nanoparticles.

Oxide Nanowires, Optical Nonlinearity, Second Harmonic Generation.