ABSTRACT
This chapter discusses the use of resonant nanoparticles for creation of meta-surfaces enabling efficient control of light at nanoscale. It overviews different types of meta-surfaces, based on the type of used building blocks (meta-atoms). Some researchers took a different approach, instead of trying to remove the difficulties in metamaterials, they tried to bypass them. Since multi-layer structures are difficult, they decided to use only a single layer of metamaterials, later called meta-surface. However a metasurface is not just a single layer metamaterial. One interesting function of metasurface is to control phase distribution of a light beam that may change the conventional reflection and refraction at interfaces. A large variety of metasurface have been proposed for different applications working at different frequencies. One of the simplest meta-atoms is a dipole antenna, which in practice is usually realized as a rectangular rod.
