FDTD simulation of the optical properties for gold nanoparticles

被引：58

作者：

Cheng, Lin ^{[1
]}

Zhu, Guixian ^{[1
]}

Liu, Gannan ^{[1
]}

Zhu, Lianqing ^{[1
]}

机构：

[1] Beijing Informat Sci & Technol Univ, Dept Instrument Sci & Optoelect Engn, Beijing, Peoples R China

来源：

MATERIALS RESEARCH EXPRESS | 2020年 / 7卷 / 12期

基金：

中国国家自然科学基金;

关键词：

finite-difference time-domain (FDTD); local surface plasmon resonance (LSPR); surface enhanced Raman scattering (SERS); gold nanoparticles; SCATTERING;

D O I：

10.1088/2053-1591/abd139

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The optical properties of gold nanoparticles such as strong extinction and surface plasmon resonance can be adjusted by altering the structure, which was used widely in the surface enhanced Raman scattering (SERS). In this paper, the optical properties of gold nanoparticles were investigated by using the Finite-Difference Time-Domain (FDTD) method. The influences of AuNP-size and NP-NP-spacing on the local electric field and extinction properties were analyzed in detail. The results showed that the electric field intensity of AuNPs increased rapidly with the increasing size. Meanwhile, the formant appeared blue shift and the peak intensity increased first and then decreased with the increase of NP-NP-spacing. The theoretical calculation results are concordant with experimental results. The FDTD simulation results of this paper have a guiding significance in SERS areas.

引用

页数：8

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