High permittivity SrTiO₃ for the realization of all-dielectric metamaterials operating at terahertz frequencies was fabricated. A comparison of different processing methods demonstrates that Spark Plasma Sintering is the most effective sintering process to yield high density ceramic with high permittivity. We compare this sintering process with two other processes. The fabricated samples are characterized in the low frequency and in the terahertz frequency ranges. Their relative permittivities are compared with that of a reference SrTiO₃ single crystal. The permittivity of the sample fabricated by Spark Plasma Sintering is as high as that of the single crystal. The role of the signal-to-noise ratio in the measurements at terahertz frequency is detailed.

中文翻译：

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高介电常数处理过的SrTiO3，用于太赫兹频率下的超材料应用。

制备了用于实现以太赫兹频率工作的全介电超材料的高介电常数SrTiO ₃。对不同工艺方法的比较表明，放电等离子烧结是生产具有高介电常数的高密度陶瓷的最有效烧结工艺。我们将该烧结过程与其他两个过程进行了比较。所制造的样品的特征在于低频和太赫兹频率范围。将它们的相对介电常数与参考SrTiO ₃单晶的相对介电常数进行比较。通过火花等离子体烧结制备的样品的介电常数与单晶的介电常数一样高。详细介绍了信噪比在太赫兹频率下的测量作用。