A cascaded difference frequency generation (DFG) method for high-efficiency terahertz generation is presented, which is combined with cavity phase matching and quasi phase matching. The results show that a ten-orders cascade effect can be approximately satisfied, with a peak photon conversion efficiency of 447.6%, which exceeds the Manley-Rowe limit. This method is expected to contribute to improving the conversion efficiency of DFG for terahertz generation.

中文翻译：

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结合腔相位匹配和准相位匹配的级联差分频率生成方法，用于高效太赫兹生成

提出了一种与空洞相位匹配和准相位匹配相结合的高效太赫兹频率产生的级联差分频率产生方法。结果表明，可以近似满足十阶级联效应，峰值光子转换效率为447.6％，超过了Manley-Rowe极限。预期该方法将有助于提高用于太赫兹产生的DFG的转换效率。