Second- Harmonic Generation Improved of ZnS/Au Core/Shell Nanomaterials

Abstract

we provide the synthesis and characterization of semiconductor nanowire attached with metallic nanoparticles.
The wires consist of zinc sulfide (ZnS) attached with gold nanoparticles (Au NPs). The nonlinear optical
properties of the semiconductor nanowires are combined with the plasmonic of metallic nanoparticles (Au NPs)
and offer an improved optical signal in the near infrared spectral range. The plasmonic of a metallic (Au NPs)
offers the effect of locally improving the electric field of the incident light on the nanowire and consequently
inducing a much stronger second harmonic generation (SHG) signal. By comparing SHG signals measured from
bare ZnS NWs and ZnS –Au hybrid nanostructures we obtain 6 time improvement of the SHG intensity It is
demonstrated that is ZnS NWs is an ideal candidate for nanolasers, nanoprobes especially for the ultraviolet
region, nonlinear optical microscopy and nanophotonic.

Keywords: plasmonic nanostructures. Chemical synthesis, ZnS NWs, Second - Harmonic generation (SHG).