Strong-Field-Enhanced Spectroscopy in Silicon Nanoparticle Electric and Magnetic Dipole Resonance near a Metal Surface
Strong-Field-Enhanced Spectroscopy in Silicon Nanoparticle Electric and Magnetic Dipole Resonance near a Metal Surface
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金属表面附近硅纳米颗粒电偶极子共振的强场增强光谱
DOI：
10.1021/acs.jpcc.5b10045
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发表时间：
2015-12-17
影响因子：
3.7
通讯作者：
Xu, Ke
中科院分区：
文献类型：
--
作者：
Huang, Zengli;Wang, Jianfeng;Xu, Ke
提出并证明了由低损耗半导体纳米颗粒和金属薄膜组成的混合偶极共振系统中的强场增强光谱。这种混合硅纳米颗粒/银系统具有非凡的近场增强和大场限制。进行了大量的数值计算，以调查的影响差距的大小，颗粒直径，和金属基板上的近场增强响应的Si颗粒-金属间隙，以正确地模拟其杂交。我们的分析表明，这种近场增强源于强间隙磁共振响应的Si纳米粒子的偶极子与金属镜像和金属膜表面等离子体效应的相互作用。我们进一步证明了强增强的拉曼光谱的单个硅纳米粒子在银膜与精确尺寸的分子间隔层之间。这些结果说明了低损耗硅粒子在光纤放大器中的容量和可调谐性。
Strong-field-enhanced spectroscopy in a hybrid dipole resonance system composed of a low-loss semiconductor nanoparticle and metal film is proposed and demonstrated. This hybrid Si nanoparticle on silver system is featuring extraordinary near-field enhancement and large field confinement. Extensive numerical calculations are carried out to investigate the influence of the gap size, particle diameter, and metal substrate on the near-field enhancement response in the Si particle–metal gap in order to properly model their hybridization. Our analysis reveals that this near-field enhancement originates from the strong gap magnetic resonance response by the Si nanoparticle dipole interaction with metal mirror image and metal film surface plasmon effects. We further demonstrate the strong enhanced Raman spectroscopy of a single silicon nanoparticle over Ag film with a precisely sized molecular spacer layer between them. These results illustrate the capacity and tunability of the low-loss silicon particle on the ...