We analyze the enhancement mechanisms of magneto-optical effects in all-dielectric metasurfaces caused by the bound state in the continuum resonance. In a structure under study, a square lattice of bismuth substituted yttrium iron garnet nanodisks with an air hole displaced away from the disk axis, magneto-optical polarization and intensity effects reach 0.7° and 22%, respectively.

Femtosecond dynamics of the Faraday effect is experimentally studied in thin magnetic films by polarization-sensitive correlation spectroscopy.

The need to replace bulk classical optical elements with their compact nanoscale counterparts stimulates research of new materials, their production and processing methods, optical properties calculation, and experimental verification. The possibility of using laser-induced periodic structures on the surface of thin chalcogenide As₅₀Se₅₀ films as polarization optics elements has been studied. Designing the surface relief allows one to create waveplates with predetermined electromagnetic properties.