论文标题
拉曼转移由级联的二次非线性引起的terahertz代
Raman Shifting induced by Cascaded Quadratic Nonlinearities for Terahertz Generation
论文作者
论文摘要
我们引入了级联二次非线性的新制度，该级别非线性导致光泵的连续红移，类似于拉曼转移过程而不是自相度调制。这与Terahertz的一代尤其重要，在Terahertz的一代中，泵的连续红移可以解决当前问题，例如分散管理和激光诱导的损坏。我们表明，在没有吸收或色散的情况下，提出的拉曼转移方法将导致光学到terahertz的能量转换效率，即接近$ 100 \％$，而传统的级联差异差异产生是不可能的。此外，我们介绍了多个固定结构的设计，即使在存在分散和吸收的情况下，也会导致$ \％$ $ \％$的能量转换效率。
We introduce a new regime of cascaded quadratic nonlinearities which result in a continuous red shift of the optical pump, analogous to a Raman shifting process rather than self-phase modulation. This is particularly relevant to terahertz generation, where a continuous red shift of the pump can resolve current issues such as dispersion management and laser-induced damage. We show that in the absence of absorption or dispersion, the presented Raman shifting method will result in optical-to-terahertz energy conversion efficiencies that approach $100\%$ which is not possible with conventional cascaded difference-frequency generation. Furthermore, we present designs of aperiodically poled structures which result in energy conversion efficiencies of $\approx 35\%$ even in the presence of dispersion and absorption.
