Zhou Huaqing, Liu Haigang, Sang Minghuang, Li Jun, Chen Xianfeng
Opt Express. 2017 Feb 20;25(4):3774-3779. doi: 10.1364/OE.25.003774.
We numerically and experimentally investigated the nonlinear Raman-Nath second harmonic generation of hybrid structured fundamental wave whose phase modulation combined periodic and random structure. The second harmonic generation of both one- and two-dimensional hybrid structured fundamental wave were investigated in this paper. The results show that more diffraction spots can be obtained in these hybrid structures than the pure periodic modulation cases. Besides, the total intensity of the second harmonic not only can be dramatically enhanced without altering the diffraction angles, but also is increasing with the degree of randomness of the structure. This study enriches the family of second harmonic generation of structured fundamental wave and has potential application in dynamically controlling second harmonic wave in arbitrary directions.
我们通过数值模拟和实验研究了混合结构基波的非线性拉曼-纳特二次谐波产生，其相位调制结合了周期性和随机结构。本文研究了一维和二维混合结构基波的二次谐波产生。结果表明，与纯周期性调制情况相比，这些混合结构中可以获得更多的衍射光斑。此外，二次谐波的总强度不仅可以在不改变衍射角的情况下显著增强，而且随着结构随机性程度的增加而增大。这项研究丰富了结构化基波二次谐波产生的种类，并在动态控制任意方向的二次谐波方面具有潜在应用。
