Effective nonlinearity coefficients for three-wave interactions in biaxial crystal of mm2 point group symmetry
Effective nonlinearity coefficients for three-wave interactions in biaxial crystal of mm2 point group symmetry
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DOI：
10.1016/0030-4018(93)90066-e
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发表时间：
1993
影响因子：
2.4
通讯作者：
V. Dmitriev;D. N. Nikogosyan
中科院分区：
文献类型：
--
作者：
V. Dmitriev;D. N. Nikogosyan
得到了单晶物理(光学)和单晶(压电)坐标系之间六种不同指配的点群对称的正交双轴晶体中三波相互作用的有效非线性系数。在前一个坐标系中，介质磁导率张量是对角张量，在后一个坐标系中，定义了平方非线性张量。点群pmm2包括一些新的有前景的非线性光学晶体，如KTP、LBO、MNA等。对于光在双轴晶体主平面中传输的特殊情况，给出了相互作用波(相互作用类型)与相应的有效非线性系数之间可能的位相匹配类型。该方法可推广到具有其他点群对称性的非线性双轴晶体。
The effective nonlinearity coefficients for three-wave interactions in the orthorhombic biaxial crystal ofmm2 point group symmetry for six different assignments between the crystallophysical (optical) and crystallographic (piezoelectric) coordinate systems have been obtained. In the former coordinate system the dielectric permeability tensor is the diagonal one, in the latter the square nonlinearity tensor is defined. The point groupmm2 includes sone new perspective nonlinear optical crystals such as KTP, LBO, mNA and others. For the particular case of light propagation in the principal planes of a biaxial crystal, possible types of phase matching between the interacting waves (types of interaction) and corresponding effective nonlinearity coefficients are given. The proposed method can be generalized to the nonlinear biaxial crystal of other point group symmetry.