We present experimental observations of the high-performance magneto-optic (MO) CeF₃ crystal using terahertz time-domain spectroscopy (THz-TDS) in the temperature range 40–300 K for the first time. The complex refractive index strongly depends on temperature, which increases with increasing temperature. Intriguingly, the changes of complex refractive index values reach more than 0.1 between 40 K and 300 K, which is larger than terbium scandium aluminum garnet (TSAG) crystal. The weak loss tangent indicates that the crystal has a high potential as a high-dielectric-constant photovoltaic device in the terahertz domain.

中文翻译：

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高性能磁光CeF ₃晶体的温度相关太赫兹介电调制

我们首次在40–300 K的温度范围内使用太赫兹时域光谱（THz-TDS）对高性能磁光（MO）CeF ₃晶体进行了实验观察。复数折射率强烈取决于温度，温度随温度升高而增加。有趣的是，复折射率值的变化在40 K和300 K之间达到0.1以上，这比ter镓铝石榴石（TSAG）晶体大。损耗角正切较弱，表明该晶体作为太赫兹域中的高介电常数光伏器件具有较高的电势。