Ferroelectric phase transitions and properties of nonlinear optical crystals of KTiOPO4 and its analogs
Ferroelectric phase transitions and properties of nonlinear optical crystals of KTiOPO4 and its analogs
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KTiOPO4及其类似物非线性光学晶体的铁电相变和性质
DOI：
10.1070/qe1988v018n04abeh011769
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
V. K. Yanovskiǐ
中科院分区：
文献类型：
--
作者：
V. Voronkova;S. Stefanovich;V. K. Yanovskiǐ
从熔融溶液中生长出新型高效非线性光学化合物 KTiOPO4 (KTP)、RbTiOPO4 (RTP) 和 TlTiOPO4 (TTP) 的单晶，并研究了它们的一些物理性质特征。这些晶体中产生的激光辐射二次谐波强度及其介电常数的温度依赖性揭示了在 934 °C (KTP)、789 °C (RTP) 和 581 °C (TTP) 温度下的二阶铁电相变。此外，这些晶体表现出异常高的离子电导率。铁电性和电导率可能会显着影响这些晶体的非线性光学特性。
Single crystals of new efficient nonlinear optical compounds KTiOPO4 (KTP), RbTiOPO4 (RTP), and TlTiOPO4 (TTP) were grown from molten solutions and some characteristics of their physical properties were investigated. The temperature dependences of the intensity of the second harmonic of laser radiation generated in these crystals and of their permittivities revealed a second-order ferroelectric phase transition at temperatures 934 °C (KTP), 789 °C (RTP), and 581 °C (TTP). Moreover, these crystals exhibited an anomalously high ionic electrical conductivity. The ferroelectricity and the conductivity could affect significantly nonlinear optical characteristics of these crystals.