Quantifying the radiation efficiency of nano antennas

Yuval Yifat, Zeev Iluz, Michal Eitan, Inbal Friedler, Yael Hanein, Amir Boag, Jacob Scheuer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number111113
JournalApplied Physics Letters
Issue number11
StatePublished - 12 Mar 2012


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