Enhancing Second Harmonic Generation in Gold Nanoring Resonators Filled with Lithium Niobate
Enhancing Second Harmonic Generation in Gold Nanoring Resonators Filled with Lithium Niobate
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DOI：
10.1021/nl5038819
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发表时间：
2015-02-01
期刊：
影响因子：
10.8
通讯作者：
Tuennermann, Andreas
中科院分区：
文献类型：
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作者：
Lehr, Dennis;Reinhold, Joerg;Tuennermann, Andreas
等离子体纳米环提供了在其核心内显著的等离子体场增强的独特优势。如果填充有可极化介质，则可以显著增强其光学效果。在这里，我们证明了这一主张，通过填充金纳米环锂的碳酸盐。将所产生的二次谐波信号与源自未图案化的碳酸锂表面的信号进行比较。测量和模拟证实了约20的增强。需要纳米级局部光源的应用，如荧光光谱或量子通信，将受益于我们的发现。
Plasmonic nanorings provide the unique advantage of a pronounced plasmonic field enhancement inside their core. If filled with a polarizable medium, it may significantly enhance its optical effects. Here, we demonstrate this proposition by filling gold nanorings with lithium niobate. The generated second harmonic signal is compared to the signal originating from an unpatterned lithium niobate surface. Measurements and simulation confirm an enhancement of about 20. Applications requiring nanoscopic localized light sources like fluorescence spectroscopy or quantum communication will benefit from our findings.