Design considerations for near-field enhancement in optical antennas

被引：26

作者：

Fernandez-Garcia, Roberto ^{[1
]}

Sonnefraud, Yannick ^{[1
]}

Fernandez-Dominguez, Antonio I. ^{[1
]}

Giannini, Vincenzo ^{[1
]}

Maier, Stefan A. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England

来源：

CONTEMPORARY PHYSICS | 2014年 / 55卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

nanoantennas; localised surface plasmon resonances; cross-section; field enhancement; REFRACTIVE-INDEX DEPENDENCE; RAMAN-SCATTERING; PLASMON RESONANCE; ADHESION LAYER; SILVER NANOPARTICLES; GOLD; NANOSTRUCTURES; NANOANTENNAS; NANOPLASMONICS; LIGHT;

D O I：

10.1080/00107514.2013.850788

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nanoantennas for visible and infrared radiation can strongly enhance the interaction of light with matter by their ability to localise electromagnetic fields on nanometric scales. This allows for the engineering of the absorption and radiation capabilities of nanoemitters, such as dye molecules or quantum dots. In this article, we discuss the main parameters influencing the near-field enhancement provided by dimer-type nanoantennas, the configuration most thoroughly studied in the literature. To facilitate the design of structures, we analyse the influence of the substrate, adhesion layers and a reflective metal underlayer, as well as their arrangement in a periodic fashion. We also highlight the factors which increase the damping of the localised plasmonic modes and the spectral differences between far and near-field resonances.

引用

页码：1 / 11

页数：11

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