Guillet de Chatellus H, Freysz E
Centre de Physique Moléculaire Optique et Hertzienne, Unité Mixte de Recherche 5798, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence Cedex, France.
Opt Lett. 2003 Sep 15;28(18):1624-6. doi: 10.1364/ol.28.001624.
We use the electric-field-induced second-harmonic (EFISH) technique to characterize, for the first time to our knowledge, the profile of the electric field induced within the bulk of fused silica glass samples both during and after thermal-poling treatment. During thermal poling, the initially homogeneous electric field decays exponentially from the anodic to the cathodic surface. After the poling treatment, a permanent electric field is induced within the bulk of the sample. It also decays exponentially from a positive value on the anodic surface to a negative value on the cathodic surface. The exponential decay constant depends on the thickness of the sample, the poling time, and the temperature. The temperature evolution of this constant makes it possible to retrieve the activation energy of the rapidly moving ionic species. This ensemble of observations indicates that modifications to models previously proposed are necessary.
据我们所知，我们首次使用电场诱导二次谐波（EFISH）技术来表征热极化处理期间及之后熔融石英玻璃样品内部所感应的电场分布。在热极化过程中，初始均匀的电场从阳极表面到阴极表面呈指数衰减。极化处理后，样品内部感应出一个永久电场。它也从阳极表面的正值到阴极表面的负值呈指数衰减。指数衰减常数取决于样品厚度、极化时间和温度。该常数随温度的变化使得获取快速移动离子物种的活化能成为可能。这一系列观察结果表明，有必要对先前提出的模型进行修正。
