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arXiv 1506.09092physics.optics
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非线性光学用结构光确定晶体的对称群

Nonlinear optics determination of the symmetry group of a crystal using structured light

Rocio Jauregui, Juan P. Torres

摘要:

利用结构光非线性光学,提出了一种揭示非线性晶体所属对称群的方法。我们认为作为例子的过程中的自发参量下转换。用特殊类型的贝塞尔光束照射的晶体,其特征在于非线性磁化率张量,其结构由晶体的对称群决定。低频产生的光的空间角度依赖性的观察提供了关于晶体的对称群的直接信息。

英文摘要:

We put forward a technique to unveil to which symmetry group a nonlinear crystal belongs, making use of nonlinear optics with structured light. We consider as example the process of spontaneous parametric down-conversion. The crystal, which is illuminated with a special type of Bessel beam, is characterized by a nonlinear susceptibility tensor whose structure is dictated by the symmetry group of the crystal. The observation of the spatial angular dependence of the lower-frequency generated light provides direct information about the symmetry group of the crystal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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