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Three-dimensional nonlinear photonic crystal in naturally grown potassium–tantalate–niobate perovskite ferroelectrics
Light: Science & Applications ( IF 20.6 ) Pub Date : 2020-11-24 , DOI: 10.1038/s41377-020-00427-z
Chang Li , Xuping Wang , Yang Wu , Fei Liang , Feifei Wang , Xiangyong Zhao , Haohai Yu , Huaijin Zhang

Since quasi-phase-matching of nonlinear optics was proposed in 1962, nonlinear photonic crystals were rapidly developed by ferroelectric domain inversion induced by electric or light poling. The three-dimensional (3D) periodical rotation of ferroelectric domains may add feasible modulation to the nonlinear coefficients and break the rigid requirements for the incident light and polarization direction in traditional quasi-phase-matching media. However, 3D rotating ferroelectric domains are difficult to fabricate by the direct external poling technique. Here, we show a natural potassium–tantalate–niobate (KTN) perovskite nonlinear photonic crystal with spontaneous Rubik’s cube-like domain structures near the Curie temperature of 40 °C. The KTN crystal contains 3D ferroelectric polarization distributions corresponding to the reconfigured second-order susceptibilities, which can provide rich reciprocal vectors to compensate for the phase mismatch along an arbitrary direction and polarization of incident light. Bragg diffraction and broadband second-harmonic generation are also presented. This natural nonlinear photonic crystal directly meets the 3D quasi-phase-matching condition without external poling and establishes a promising platform for all-optical nonlinear beam shaping and enables new optoelectronic applications for perovskite ferroelectrics.



中文翻译:

天然钽酸钽铌铁钙钛矿铁电体中的三维非线性光子晶体

自1962年提出非线性光学的准相位匹配以来,非线性光子晶体通过电或光极化引起的铁电畴反转迅速发展。铁电畴的三维(3D)周期性旋转可为非线性系数增加可行的调制,并打破传统准相位匹配介质中对入射光和偏振方向的严格要求。然而,通过直接外部极化技术难以制造3D旋转铁电畴。在这里,我们显示了居里温度40°C附近的天然钽酸铌铌(KTN)钙钛矿非线性光子晶体,具有自发的Rubik立方状畴结构。KTN晶体包含对应于重新配置的二阶磁化率的3D铁电极化分布,这可以提供丰富的互逆矢量,以补偿沿任意方向的相位不匹配和入射光的偏振。还介绍了布拉格衍射和宽带二次谐波产生。这种天然的非线性光子晶体无需外部极化即可直接满足3D准相位匹配条件,并为全光非线性光束整形建立了一个有希望的平台,并为钙钛矿铁电体提供了新的光电应用。还介绍了布拉格衍射和宽带二次谐波产生。这种天然的非线性光子晶体无需外部极化即可直接满足3D准相位匹配条件,并为全光非线性光束整形建立了一个有希望的平台,并为钙钛矿铁电体提供了新的光电应用。还介绍了布拉格衍射和宽带二次谐波产生。这种天然的非线性光子晶体无需外部极化即可直接满足3D准相位匹配条件,并为全光非线性光束整形建立了一个有希望的平台,并为钙钛矿铁电体提供了新的光电应用。

更新日期:2020-11-25
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