Quantifying the radiation efficiency of nano antennas

被引：21

作者：

Yifat, Yuval ^{[1
]}

Iluz, Zeev ^{[1
]}

Eitan, Michal ^{[1
]}

Friedler, Inbal ^{[1
]}

Hanein, Yael ^{[1
]}

Boag, Amir ^{[1
]}

Scheuer, Jacob ^{[1
]}

机构：

[1] Tel Aviv Univ, Sch Elect Engn, Dept Phys Elect, IL-69978 Tel Aviv, Israel

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 11期

关键词：

RESONANCES; RANGE; LIGHT;

D O I：

10.1063/1.3694278

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The radiation efficiency of nano antennas is a critical parameter determining their suitability for various applications. To that end, the radiation efficiency of a single antenna is directly quantified using far-field measurements of the reflectance of an array comprising identical nano-antennas. Excellent agreement in terms of resonance frequencies, optical bandwidth, and scattering efficiency is found between the results of experimental measurements and finite element-based numerical analysis of scattering from Au nano-antenna arrays. Extremely high overall radiation efficiencies, exceeding 82%, are obtained. The high efficiency can facilitate the employment of such nano-antennas for applications in imaging, spectroscopy, and solar energy harvesting. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3694278]

引用

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