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Fano-resonance-based mode-matching hybrid metasurface for enhanced second-harmonic generation

机译:基于Fano-Aronance的模式匹配混合元曲面,用于增强二次谐波生成

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Plasmonic nanostructures have been considered as potential candidates for enhancing the nonlinear upconversion rate at nanoscale levels due to their strong near-field enhancement. Here, we propose a Fano-resonance-based mode-matching hybrid metasurface that combines the advantages of Fano resonances and mode-matching for boosting second-harmonic conversion. A confined and strong near-field intensity is generated by gold nanoantennas within the volume of polycrystalline zinc sulfide nanoparticles, thus resulting in a larger effective second-harmonic coefficient. The combination of the abovementioned features allows for the realization of a second-harmonic generation (SHG) conversion efficiency of 5.55 x 10(-8), and the SHG signal is twice that obtained with dipole hybrid metasurfaces. Our designed metasurface may pave the way for optimizing nonlinear light-matter interactions at the nanoscale. (C) 2017 Optical Society of America
机译:由于其强烈的近场增强,等离子体纳米结构被认为是提高纳米级水平的非线性上变化率的潜在候选。 在这里,我们提出了一种基于扇形共振的模式匹配混合元表面,其结合了Fano共振和模式匹配的优点,以提高二次谐波转换。 由多晶锌硫化锌纳米颗粒的体积内的金纳纳环产生狭窄和强大的近场强度,从而产生更大的有效的二谐波系数。 上述特征的组合允许实现5.55×10(-8)的二次谐波产生(SHG)转换效率,并且SHG信号是用偶极混合元刷获得的两倍。 我们设计的Metasurface可以为优化纳米级的非线性光物质相互作用铺平道路。 (c)2017年光学学会

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