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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Wavelength modulated SERS hot spot distribution in 1D nanostructures on metal film
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Wavelength modulated SERS hot spot distribution in 1D nanostructures on metal film

机译：金属薄膜上一维纳米结构中的波长调制SERS热点分布

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摘要

Surface plasmons confining strong electromagnetic fields near metal surfaces, well-known as hot spots, provide an extremely efficient platform for surface-enhanced Raman scattering (SERS). In this work, SERS spectra of probing molecules in a silver particle-wire 1D nanostructure on a thin gold film are investigated. The Raman features of SERS spectra collected at the particle-wire joints exhibit an obvious wavelength dependence phenomenon. This result is confirmed electromagnetic field simulation, revealing that hot spot distribution is sensitively influenced by the wavelength of incident light at the joints. Further studies indicate this wavelength dependence of hot spot distribution is immune to influence from the geometric shape of the particle or the angle between wire and particle, which improves fabrication tolerance. This technology may have promising applications in surface plasmon related fields, such as ultrasensors, solar energy and selective surface catalysis.
机译：表面等离子体激元将强电磁场限制在金属表面附近（众所周知的热点），为表面增强拉曼散射（SERS）提供了极为有效的平台。在这项工作中，研究了在金薄膜上的银粒子线一维纳米结构中探测分子的SERS光谱。在颗粒-金属丝连接处收集的SERS光谱的拉曼特征表现出明显的波长依赖性现象。该结果得到了电磁场仿真的证实，揭示了热点分布受到关节处入射光波长的敏感影响。进一步的研究表明，热点分布的这种波长依赖性不受颗粒几何形状或导线与颗粒之间角度的影响，从而提高了制造公差。这项技术可能在与表面等离激元相关的领域中具有广阔的应用前景，例如超传感器，太阳能和选择性表面催化。

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