Fano Resonance in Metasurfaces and Its Application

Metasurfaces are the special case of metamaterials when periodic structures are located in a plane. Here we consider Fano resonances found in them. Special attention is paid to the recently found such type resonance in a mirrored array of split-ring resonators. The resonance appears due to the direct interaction of the lattice and plasmonic modes. Its frequency can be altered by changing the period of the array. The high-quality factor of Fano resonance, around 100, has been evidenced experimentally. Possible applications of the Fano resonance are considered.