Plexciton for surface enhanced Raman scattering and emission,Journal of Raman Spectroscopy

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Plexciton for surface enhanced Raman scattering and emission
Journal of Raman Spectroscopy ( IF 2.4 ) Pub Date : 2019-12-02 , DOI: 10.1002/jrs.5806
Yanting Feng _{1,

2} , Man Gao ₂ , Yu Wang ₂ , Lingyan Meng ₂ , Mengtao Sun ₁

Affiliation

Plexcitons are polaritonic modes that result from coherently coupled plasmons and excitons. Far‐ and near‐field properties of Ag/semiconductor core–shell nanoparticles on silica‐coated silver substrate were theoretically studied, using finite‐difference time‐domain method. Our calculations suggested that titanium dioxide (TiO₂) would be a better coating material, useful for the design of high‐sensitive surface enhanced Raman scattering (SERS) substrate. The calculated Raman enhancement factor could be turned to as high as 4.0 × 10¹⁰ under the 633‐nm laser excitation. Surface plasmon‐coupled emission of SERS reveals an optimal collection angle of 5°, which shows a huge back scattering of the studied system. Our theoretical results could be used as a reference for the experimental design of semiconductor‐based SERS substrate with high efficiency.

中文翻译：

用于表面增强拉曼散射和发射的Plexciton

丛激子是由相干耦合的等离激元和激子产生的极化模式。使用有限差分时域方法，对银/半导体核壳纳米粒子在涂有二氧化硅的银基板上的近场和近场特性进行了理论研究。我们的计算表明，二氧化钛（TiO ₂）是一种更好的涂料，可用于设计高灵敏度的表面增强拉曼散射（SERS）基材。计算得出的拉曼增强因子可以高达4.0×10 ¹⁰在633 nm激光激发下 SERS的表面等离激元耦合发射显示出5°的最佳收集角，这表明了所研究系统的巨大反向散射。我们的理论结果可为基于半导体的SERS基板高效实验设计提供参考。

更新日期：2019-12-02

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