Nanoplasmonic Quasi Crystal Metascreen Optimized for Efficient Light Absorption

A metascreen absorber composed of plasmonic nan-odisk array is used to absorb incident radiation at optical frequencies. The conventional Nobel metals such as gold and silver are considered as best plasmonic materials to couple incident light to surface plasmons modes. However, it is found that alternative plasmonic materials such as copper (Cu) offers optimized absorption characteristics. Copper nanodisk absorber offers a broad range of optical absorption ranging from 400 nm - 1500 nm wavelength. In addition, it is found that the light absorption bandwidth can be significantly enhanced or near perfect absorption can be reached if plasmonic nanodisks are arranged in quasi-crystal configuration. The proposed quasicrystal based metascreen absorber offers potential applications for light energy harvesting and optical sensing applications.