Quasi-phase-matched third-harmonic generation in a quasi-periodic optical superlattice
Quasi-phase-matched third-harmonic generation in a quasi-periodic optical superlattice
复制标题
DOI：
10.1126/science.278.5339.843
复制
发表时间：
1997-10-31
期刊：
影响因子：
56.9
通讯作者：
Ming, NB
中科院分区：
文献类型：
--
作者：
Zhu, S;Zhu, YY;Ming, NB
准周期结构可以引入到非线性光学材料中，如LiTaO3晶体。这种结构用于准相位匹配二次谐波的产生。这些材料现在被证明能够通过准相位匹配耦合二次谐波产生和和频率产生。该方法通过耦合参数过程实现了高效率的直接三次谐波产生。结果表明，准相位匹配过程可以在二次非线性介质中产生高次谐波，从而表明准周期结构材料在非线性光学中的重要应用。
Quasi-periodic structure can be introduced into nonlinear optical materials such as LiTaO3 crystals. Such structures were used for quasi-phase-matching second-harmonic generation. These materials are now shown to be able to couple second-harmonic generation and sum-frequency generation through quasi-phase-matching. The approach led to a direct third-harmonic generation with high efficiency through a coupled parametric process. The result verifies that high-order harmonics may be generated in a quadric nonlinear medium by a number of quasi-phase-matching processes, and therefore, exhibits a possible important application of quasi-periodic structure materials in nonlinear optics.