Change in the state of a ferroelectric in a strong electromagnetic wave

Results of investigations of changes in the state of a ferroelectric crystal, through which an intense electromagnetic-energy flux is transmitted, are analyzed. It is found that the main parameters determining the phase transition change significantly in this case. In addition, some phenomena develop which are characteristic only of open thermodynamic systems (self-assembling dissipative structures arise). These phenomena manifest themselves upon generation of the second optical harmonic in crystals where natural matching is absent.