Nonlinear magnetooptical effects

Electrooptic and magnetooptic effects involve changes in the refractive index of a medium caused by an external electric or magnetic field. These are not normally thought of as nonlinear optical effects but are technically nonlinear optical processes in which the frequency of one of the fields is equal to zero. Various electrooptic and magnetooptic effects can occur depending on the situation. Some of these were listed in Table I. 

The problem of designing new polymer-based composite materials containing metal nanoparticles (MNPs) is of current interest, particularly in the fabrication of magnetooptic data storages, picosecond optical switches, directional connectors, and so on. The nonlinear optical properties of these composites stem from the dependence of their refractive index on incident light intensity. This effect is associated with MNPs, which exhibit a high nonlinear susceptibility of the third order when exposed to ultrashort (picosecond or femtosecond) laser pulses [1]. 

---