Grilli Simonetta, Ferraro Pietro, Paturzo Melania, Alfieri Domenico, De Natale Paolo, de Angelis Marella, De Nicola Sergio, Finizio Andrea, Pierattini Giovanni
Opt Express. 2004 May 3;12(9):1832-42. doi: 10.1364/opex.12.001832.
In-situ monitoring of domain reversal in congruent lithium niobate by a digital holographic technique is described. While the ferroelectric polarization is reversed by electric field poling, the two-dimensional distribution of the phase shift, due mainly to the linear electro-optic and piezoelectric effects, is measured and visualized. Digital holography is used to reconstruct both amplitude and phase of the wavefield transmitted by the sample to reveal the phase shift induced by adjacent reversed domains during the poling. The resulting movies of both amplitude and phase maps, for in-situ visualization of domain pattern formation, are shown. The possibility of using the technique as tool for monitoring in real-time the periodic poling of patterned samples is discussed.
描述了一种通过数字全息技术对同成分铌酸锂中的畴反转进行原位监测的方法。当通过电场极化使铁电极化反转时，主要由于线性电光效应和压电效应引起的相移的二维分布被测量并可视化。数字全息术用于重建样品透射波场的幅度和相位，以揭示极化过程中相邻反转畴引起的相移。展示了所得的幅度图和相位图的动态影片，用于原位观察畴图案的形成。讨论了将该技术用作实时监测图案化样品周期性极化工具的可能性。
