Conical second harmonic generation in a two-dimensional χ(2) photonic crystal:: A hexagonally poled LiTaO3 crystal -: art. no. 133904
Conical second harmonic generation in a two-dimensional χ(2) photonic crystal:: A hexagonally poled LiTaO3 crystal -: art. no. 133904
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DOI：
10.1103/physrevlett.93.133904
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发表时间：
2004-09-24
影响因子：
8.6
通讯作者：
Ming, NB
中科院分区：
文献类型：
--
作者：
Xu, P;Ji, SH;Ming, NB
在二维chi（2）光子晶体-六角极化LiTaO 3晶体中发现了一种新型的圆锥二次谐波。它揭示了另一种类型的非线性相互作用的存在-一个散射涉及光学参量产生的非线性介质。这种非线性相互作用可以通过准相位匹配过程在调制的χ（2）结构中被显著地放大。锥形光束记录了散射信号的空间分布，揭示了二维光子晶体的结构信息和对称性。
A new type of conical second-harmonic generation was discovered in a 2D chi((2)) photonic crystal-a hexagonally poled LiTaO3 crystal. It reveals the presence of another type of nonlinear interaction-a scattering involved optical parametric generation in a nonlinear medium. Such a nonlinear interaction can be significantly enlarged in a modulated chi((2)) structure by a quasi-phase-matching process. The conical beam records the spatial distribution of the scattering signal and discloses the structure information and symmetry of the 2D chi((2)) photonic crystal.