Multiorder nonlinear diffraction in frequency doubling processes
Multiorder nonlinear diffraction in frequency doubling processes
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DOI：
10.1364/ol.34.000848
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发表时间：
2009-03-15
期刊：
影响因子：
3.6
通讯作者：
Kivshar, Yuri S.
中科院分区：
文献类型：
--
作者：
Saltiel, Solomon M.;Neshev, Dragomir N.;Kivshar, Yuri S.
实验分析了chi(2)非线性光栅的光散射，观察到两种类型的二次谐波频率散射过程。第一个过程被确定为拉曼-纳特型非线性衍射，仅用横向相位匹配条件来解释。这种衍射的角位置由二次谐波波长和光栅周期的比值来确定。相比之下，第二类非线性散射过程仅用纵向相位匹配来解释，对非线性光栅周期不敏感。(C) 2009年美国光学学会
We analyze experimentally light scattering from chi((2)) nonlinear gratings and observe two types of second-harmonic frequency-scattering processes. The first process is identified as Raman-Nath type nonlinear diffraction that is explained by applying only transverse phase-matching conditions. The angular position of this type of diffraction is defined by the ratio of the second-harmonic wavelength and the grating period. In contrast, the second type of nonlinear scattering process is explained by the longitudinal phase matching only, being insensitive to the nonlinear grating period. (C) 2009 Optical Society of America