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Enhanced nonlinear optical response from individual silicon nanowires

机译:来自单个硅纳米线的增强的非线性光学响应

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摘要

We report about the experimental observation and characterization of nonlinear optical properties of individual silicon nanowires of different dimensions. Our results show that the nonlinear light has different components, with one of them corresponding to the second-harmonic generation (SHG). The SHG strongly depends on the polarization of the optical excitation and nanowire diameter, and gives access to the local electromagnetic field intensity distribution. Furthermore, we show that the second harmonic, when observed, is enhanced compared to bulk silicon and is sensitive to optical resonances supported by the nanowires. This offers different perspectives on the definition of silicon-based nonlinear photonic devices.
机译:我们报告有关不同尺寸的单个硅纳米线的非线性光学性质的实验观察和表征。我们的结果表明,非线性光具有不同的成分,其中之一对应于二次谐波生成(SHG)。 SHG强烈依赖于光激发的极化和纳米线直径,并且可以访问局部电磁场强度分布。此外,我们显示出,与块状硅相比,二次谐波增强了,并且对纳米线支持的光学共振敏感。这为基于硅的非线性光子器件的定义提供了不同的观点。

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