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arXiv 2007.10709physics.optics
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用于表面增强拉曼散射(SERS)的周期金属谐振器链

Periodic metal resonator chains for Surface Enhanced Raman Scattering (SERS)

Jan Sievers, Frank Heyroth, Sven Schlenker, Georg Schmidt, Alexander Sprafke, Marcel Below, Carsten Reinhardt, Jörg Schilling

摘要:

金盘链的周期性排列显示出明显的等离子体光栅共振。这些对来自在金表面上形成自组装单分子层的4-甲基苯乙烷分子的表面增强拉曼散射(SERS)信号具有明显的影响:除了明显的偏振依赖性,当激发激光波长与等离子体光栅共振匹配时,SERS光谱也表现出最大值。这些功能的解释由一个组合的近场和远场耦合的各个等离子体偶极子,允许设计的优化的纳米结构,在未来有效的SERS基板。

英文摘要:

A periodic arrangement of chains of gold discs shows pronounced plasmonic grating resonances. These have a clear impact on the Surface Enhanced Raman Scattering (SERS)-signal from 4-methylbenzenethiol molecules which form self-assembled monolayers on the gold surface: Besides a clear polarisation dependence the SERS-spectra also exhibit a maximum when the excitation laser wavelength matches the plamonic grating resonance. These features are explained by a combined near and far field coupling of the individual plasmonic dipoles allowing the design of optimized nanostructures for effective SERS-substrates in the future.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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