An analytical method to study the effects of a substrate in surface-enhanced Raman scattering

被引：4

作者：

Huang, Shao Ying ^{[1
,2
]}

Wu, Bae-Ian ^{[1
]}

Zhang, Baile ^{[1
]}

Lee, Yee Hui ^{[2
]}

Liberman, Vladimir ^{[3
]}

Rothschild, Mordechai ^{[3
]}

机构：

[1] MIT, Elect Res Lab, Cambridge, MA 02139 USA

[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

[3] MIT, Lincoln Lab, Lexington, MA 02420 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 11期

关键词：

electromagnetic fields; nanoparticles; numerical analysis; surface enhanced Raman scattering; NANOSPHERE LITHOGRAPHY; ELECTROMAGNETIC-FIELDS; SILVER NANOPARTICLES;

D O I：

10.1063/1.3264635

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In studies of surface-enhanced Raman scattering (SERS), individual metal nanoparticle and particle assemblies introduce enhancement of electromagnetic fields. However, the contributions to enhancement due to the substrate supporting the particles are yet to be studied analytically. In this communication, we present an analytical method to investigate the effect of a substrate with realistic layers in SERS. The proposed method quantifies the effect of a substrate on the electric field on the nanoparticles surface in SERS experiments. By applying the proposed method, optimal constructions of a substrate can be obtained to maximize the surface electric field while a poorly constructed one can be avoided. The maximization can lead to a high Raman enhancement factor. The method is verified using numerical simulations.

引用

页数：6

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