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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Space charge dynamics in thermally poled fused silica
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Space charge dynamics in thermally poled fused silica

机译：热极化熔融石英中的空间电荷动力学

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Measurements of the transient behavior of both the second-harmonic generation signal and the poling current for type-II fused silica samples under a variety of poling histories are reported. The applied voltage was switched between +5 kV, 0 V, and -5 kV with the sample maintained at 275 degrees C. Observations include: multiple time scales (seconds to minutes) for development of the non-linearity depending on the poling history; a transient second-harmonic signal on the new cathode side of the sample following voltage reversal; and hysteretic incubation intervals before growth of the non-linearity. These observations are incompatible with the usual single mobile ion (e.g. Na+) model for establishing the strong local electric field that leads to the non-linearity. An expanded model including ion-exchange between a high mobility ion (as Na+) and a much lower mobility ion (related to H+) provides a good qualitative fit to the experiments, (C) 1998 Elsevier Science B.V. All rights reserved. [References: 48]
机译：报告了在各种极化历史下对II型熔融石英样品的二次谐波产生信号和极化电流的瞬态行为的测量结果。在样品保持在275摄氏度的条件下，施加的电压在+5 kV，0 V和-5 kV之间切换。观察结果包括：多个时间尺度（几秒至几分钟），取决于极化历史，从而导致非线性发展;电压反转后，样品新阴极侧的瞬态二次谐波信号;非线性增长之前的滞后孵育间隔。这些观察结果与用于建立导致非线性的强局部电场的常规单一移动离子（例如Na +）模型不兼容。扩展模型包括高迁移率离子（如Na +）和低迁移率离子（与H +有关）之间的离子交换，为实验提供了良好的定性拟合（C）1998 Elsevier Science B.V.保留所有权利。 [参考：48]

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