Plasmonics is an exciting and promising edge research, which can join electronics and photonics at nanoscale by providing us an actual solution to the problems of nanoscale integration and data transferrate. Such research area is so-called nanophotonics, one of the most promising frontiers of knowledge, from not only a scientific but also a technology strategy, dealing the light-matter interaction below the diffraction limit and may potentially revolutionize the telecommunications, integrating optical, and sensing areas.
Rare-earth-ions (REI)s are, from our point view, the most promising elements because of their unique characteristics, such as their magnetic, luminescent, and electrochemical properties. They suit newly emerging devices for their greater efficiency, high speed, greater durability, and their miniaturization potential. In this route, nanophotonics is not only about nanodevices, it is also about new ways of sculpting the flow of light by means of plasmonic nanostructures that exhibiting fascinating optical properties which we are learning to manipulate the quantum states of a REI and control its electromagnetic radiation at the nanoscale. With innumerable practical applications in telecommunication, clean energy, biophotonics, and medical testing.