Effective optical properties of nanoparticle-mediated surface plasmon resonance sensors

被引：5

作者：

Kang, Kyungnam ^{[1
]}

Kim, Donghyun ^{[1
]}

机构：

[1] Yonsei Univ, Sch Elect & Elect Engn, Coll Engn, 50 Yonsei Ro, Seoul 03722, South Korea

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

NEAR-FIELD; SINGLE; APPROXIMATION; ABSORPTION; SCATTERING; MOLECULES; MODEL;

D O I：

10.1364/OE.27.003091

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate effective medium properties of nanoparticles (NPs) in surface plasmon (SP) resonance detection. Attention was paid to the effective medium characteristics with respect to the particle distribution in equally spaced, aggregated, and intermediate models. although effects of other parameters such as size, material, and concentration were also explored. The results suggest that the distribution may cause significant measurement deviation by as much as 20% for gold NPs and less than 5% for silica. Particle concentration showed complicated dependence in the effective medium. Different mechanisms were observed to govern effective medium properties of dielectric and metal NPs, SP mode transition and multiple scattering for silica NPs. In contrast metal damping dominated resonance characteristics for gold NPs. The results arc expected to provide fresh insights on how to apply an effective medium and interpret measured data in SP resonance sensors and beyond. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：3091 / 3100

页数：10

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