Nanophotonics, the science of controlling light at the nanoscale, has many important applications in energy harvesting, sensing, display technologies and even in the medical field. Metallic and dielectric nanoparticles support plasmonic and dielectric resonances respectively, and both enhance light-matter interaction at the nanoscale. Here, one application for each type is presented. The first part demonstrates plasmon-accelerated curing of epoxy glue, a popular industrial bonding material. Curing within a relatively short time scale was realized when gold nanoparticles whose plasmonic resonance coincides with the illumination wavelength were embedded. A theoretical model was built and the influence of relevant parameters was investigated. In the second part, I demonstrate dielectric resonance enhanced second harmonic generation (SHG) in the deep ultra violet (DUV). A zinc oxide (ZnO) nanostructure was designed to have a magnetic dipole resonance at 394nm. It enhances the SHG and produces a DUV signal around 197nm. In addition, I propose a novel nonlinear simulation method capable of calculating absolute SHG intensity and study the effect of symmetry breaking. To the best of my knowledge, this is the bluest wavelength achieved with SHG in a dielectric nanostructure.