Formation of concentric rings of antiparallel domains in the nonlinear-optical ferroelectrics in the presence of an HF field

Double pulse heterothermal technology for the formation of domain structures in ferroelectrics

“…Using condition (1), it is easy to show that, for adi abatic heating, the power density P of interfering waves necessary for formation of a temperature lattice with the temperature drop ΔT d satisfies the inequality (2) The obtained expression for the power density of the wave action is independent of the physical nature of waves and is applicable both to optical interference [8] and acoustic interference [10] methods of RDS formation bases on the principle of thermal interfer ence [5].…”

“…In 2007, we proposed a thermal interference prin ciple of RDS formation by means of a temperature field having a heterothermal character (of the temper ature lattice), which makes possible local domain switching by a homogeneous electric field [5]. Accord ing to this principle, the local stimulation of domain switching is attained by means of a temperature lattice produced by a pulsed action of interfering waves.…”

“…1). On the basis of this principle, optical interference [8] and acoustic interference [9,10] Abstract-A technology for the formation of one and two dimensional structures by means of interfering (electromagnetic or acoustic) waves and a homogeneous electric field has been proposed. This technology has made it possible to retune the spatial period of the structure during its operation by varying the frequency of interfering waves and the angles of their incidence onto a crystal.…”