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Third harmonic generation as a rapid selection tool for organic materials for nonlinear integrated optics devices

机译：三次谐波生成作为非线性集成光学器件有机材料的快速选择工具

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In the long trajectory from the synthesis of organic nonlinear optical materials to the completed all-optical device it is highly desirable to be able to concentrate a1ready in an early state on only a few promising materials. Third harmonic generation (THG) is a very convenient method as it allows measurements of the third order nonlinear coefficient of very small samples in the liquid and solid state and also of thin films. For our application in all-optical switching devices the relevant parameter is the intensity dependent refractive index (IDRI). Assuming a simple two-level model for the polymeric materials we can estimate the IDRI on the basis of THG measurements and linear absorption measurements of the materials. We have measured the THG of several polymers in the liquid state and as thin film. The nonlinear coefficients and the IDRI are derived and compared with those obtained from other methods by ourselves and from the literature.
机译：在从有机非线性光学材料的合成到完成的全光学装置的漫长轨迹中，非常希望能够在早期状态下仅将注意力集中在少数几种有希望的材料上。三次谐波生成（THG）是一种非常方便的方法，因为它可以测量液态和固态非常小的样品以及薄膜的三阶非线性系数。对于我们在全光开关设备中的应用，相关参数是强度相关的折射率（IDRI）。假设聚合物材料的简单两级模型，我们可以根据THG测量值和材料的线性吸收率测量值估算IDRI。我们已经测量了几种液态和薄膜状聚合物的THG。得出非线性系数和IDRI，并将其与我们自己和文献中从其他方法获得的非线性系数和IDRI进行比较。

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