转角相位匹配实现亚相干长度非线性光学调控  

Sub-coherence-length nonlinear optical manipulation via twist phase matching

作　　者：谢臻达 吕新杰 祝世宁 Zhenda Xie;Xinjie Lv;Shining Zhu(National Laboratory of Solid State Microstructures,School of Electronic Science and Engineering,College of Engineering and Applied Sciences,School of Physics,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China)

机构地区：[1]National Laboratory of Solid State Microstructures,School of Electronic Science and Engineering,College of Engineering and Applied Sciences,School of Physics,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China

出　　处：《Science Bulletin》2024年第9期1170-1172,共3页科学通报（英文版）

基　　金：supported by the National Key R&D Program of China (2022YFA1205100);Zhangjiang Laboratory (ZJSP21A001)。

摘　　要：As recognized since the very early age in the 1960s [1], phase matching is always the crucial problem throughout the development of the nonlinear optics up to date. This problem of the phase mismatch is raised as result of material dispersion inside a nonlinear crystal, from the momentum conservation in the optical nonlinear interaction process. In the case of the second harmonic(SH) generation, for example, the momentum of an SH photon is normally not matched to the sum of the momenta of the two fundamental beam photons, due to their different refractive indexes.

关 键 词：非线性光学 相干长度 相位匹配 

分 类 号：O437[机械工程—光学工程]