Numerical study on the mechanisms of the SERS of gold-coated pyramidal tip substrates

被引：32
|
作者：
Li, Rui [1 ]
Wang, Qiao [1 ]
Li, Hong [1 ]
Liu, Kun [1 ]
Pan, Shi [1 ]
Zhan, Weishen [2 ]
Chen, Maodu [1 ]
机构：
[1] Dalian Univ Technol, Sch Phys & Optoelect Engn, Dalian 116023, Peoples R China
[2] Dalian Univ Technol, Sch Sci, Panjin 124221, Peoples R China
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2016年 / 28卷 / 25期
基金：
中国国家自然科学基金;
关键词：
lasers; Raman; surface plasmons; surface-enhanced Raman scattering; ENHANCED RAMAN-SCATTERING; SURFACE-PLASMON RESONANCE; OPTICAL-TRANSMISSION; GAS-DETECTION; ARRAYS; NANOPARTICLES; SPECTROSCOPY;
D O I：
10.1088/0953-8984/28/25/254004
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In this paper, the physical enhancement mechanisms of the surface-enhanced Raman scattering (SERS) of pyramidal tip substrates are studied theoretically. We structure the periodic square-based arrays of adjacent nanometer pyramidal gold-coated tips on silicon. In order to determine the contribution of plasmonic or diffraction effects on the SERS, three-dimensional (3D) numerical simulations are implemented by taking into account the substrate coated with a gold thin film or a perfect electrical conductor thin film. The tip distance, metal coating thickness and incident light polarization angle are also optimized to investigate whether the further SERS signal can be enhanced.
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页数：6
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