This phenomenon is known as localized surface plasmon resonance (LSPR) and is the origin of the strong absorption/scattering of incident light by NPs such as those composed of gold (Au NPs). LSPR decays both radiatively and nonradiatively. The former plays a key role in the plasmonic enhancement of the electric field in the near-field regime, whereas the latter is responsible for generating hot electrons with very high kinetic energies, which eventually contribute to particle heating. Hot electrons generated in semiconductor-plasmonic nanostructure (NS) composites have been shown to play a central role in increasing the efficiency of solar energy conversion because of the ability to tune the wavelength over a wide resonance in the visible-to-near-infrared (NIR) region by controlling the physical shape of the NPs.