Theoretical study on surface plasmon properties of gold nanostars

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Shan, Feng^1 ; Zhang, Tong^1,2,3

Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing

210096, China^1

Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing

210096, China^2

Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute, Southeast University, Suzhou

215123, China^3

关键词: Focus of researches;    Gold nanostars;    Local field enhancement;    Metal nanostructure;    Resonance peak;    Structure parameter;    Theoretical study;    Triangular plates;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/2/022005/pdf
DOI  :  10.1088/1757-899X/322/2/022005

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

With the rapid development of nanotechnology, the surface plasmon properties of metal nanostructures have become the focus of research. In this paper, a multi-tip gold nanostars (GNSs) structure is designed theoretically, and its surface plasmon properties are simulated by using the finite element method (FEM), which is practical and versatile. Compared with the traditional spherical and triangular plate particles, the results show that the tip structure of the GNSs has a stronger hot spots effect, resulting in greater local field enhancement properties. The relationship between the structure parameters of GNSs and their resonance peaks was also studied. The results indicate that the resonance peaks of GNSs depend strongly on the size, spacing between two GNSs, quantity and refractive index of the GNSs.