Abstract

In this paper, surface-enhanced Raman scattering (SERS), a key application of plasmonics, is investigated. Since this technique is based on the interaction of light with nanostructures with proper dimensions and material, finding proper materials and calculating optimized nanostructure dimensions affects its output, greatly. In this report, after a general investigation of this application and modeling of parameters and the efficiency of the usage of core-shell nanoparticles (NPs) instead of pure NPs, regeneration and optimization of a structure based on SERS has been done. It is shown that by replacing pure AuNP with core-shell NP, the SERS enhancement factor was ~2 times greater than in the case of pure gold NP, and absorption cross-section and distribution of electric field was also greatly enhanced.

中文翻译：

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基于SERS的周期性基底受限空间内核壳纳米粒子研究

摘要

在本文中，研究了表面增强拉曼散射（SERS），它是等离子体的关键应用。由于此技术基于光与具有适当尺寸和材料的纳米结构的相互作用，因此找到合适的材料并计算优化的纳米结构尺寸会极大地影响其输出。在本报告中，在对此应用程序进行了全面调查，对参数建模以及使用核壳纳米粒子（NP）代替纯NP的效率进行了建模之后，已经完成了基于SERS的结构的再生和优化。结果表明，用核-壳NP代替纯AuNP，SERS增强因子是纯金NP的约2倍，并且吸收截面和电场分布也大大增强。