Nanophotonic technology is used to control the behaviors of light by using nanostructures. Owing to the progress of the fabrication techniques of nanostructures during the past decades, nanophotonics has become a study that can be investigated experimentally. It has been applied in several domains, including display, lighting, solar cells, and biophotonics, to obtain some new optical properties or better performances. Many novel interesting topics also have appeared recently, such as nanoantenna, metamaterials, plasmonics, etc. These results are changing our thinking about classical optics.