Laser Physics Center, Research School of Physics and Engineering, Australian National University, ACT 0200, Australia.
Opt Lett. 2011 Aug 15;36(16):3266-8. doi: 10.1364/OL.36.003266.
We report on the observation of multiple third-harmonic conical waves generated in an annular periodically poled nonlinear photonic crystal. We show that the conical beams are formed as a result of the cascading effect involving two parametric processes that satisfy either the transverse and/or longitudinal phase-patching conditions. This is the first experimental observation of third-harmonic generation based on nonlinear Raman-Nath diffraction.
我们报告了在环形周期极化非线性光子晶体中观察到的多个三次谐波锥形波。我们表明，锥形光束是由涉及两个满足横向和/或纵向相位匹配条件的参量过程的级联效应形成的。这是首次基于非线性拉曼-纳特衍射的三次谐波产生的实验观察。
