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Geometric effect on second harmonic generation from gold grating

机译:金光栅二次谐波产生的几何效应

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摘要

We numerically investigate second harmonic generation from gold gratings of an ideal rectangular and laddershaped cross-section. The SHG efficiency from the gold gratings of the ladder-shaped cross-section is significantly enhanced compared with that from the ideal rectangular cross-section with a maximum enhancement factor of around two. The enhancement is ascribe to the nanostructure dependent local fundamental electric field, the nonlinear sources and thus the far field radiation. Our results have a practical meaning in the explanation of experimental SHG measurement, and the modulation of SHG response in the metallic nanostructure.
机译:我们在理想的矩形和梯形横截面的金色光栅进行了数值调查了第二次谐波产生。 与梯形横截面的金色光栅的SHG效率显着增强,与最大增强系数大约两个的理想矩形横截面相比,显着增强。 增强依赖于纳米结构依赖性局部基本电场,非线性源,从而归因于远场辐射。 我们的结果在实验SHG测量的解释中具有实际意义,以及金属纳米结构中的SHG响应的调节。

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