Quantifying the radiation efficiency of nano antennas

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

doi:10.1063/1.3694278

Quantifying the radiation efficiency of nano antennas

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

School of Electrical Engineering

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English
Article number	111113
Journal	Applied Physics Letters
Volume	100
Issue number	11
DOIs	https://doi.org/10.1063/1.3694278
State	Published - 12 Mar 2012

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3694278

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title = "Quantifying the radiation efficiency of nano antennas",

abstract = "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.",

author = "Yuval Yifat and Zeev Iluz and Michal Eitan and Inbal Friedler and Yael Hanein and Amir Boag and Jacob Scheuer",

note = "Funding Information: This work has been partially supported by the Israeli DoD and by Tel-Aviv University Advanced Communication Center.",

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doi = "10.1063/1.3694278",

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AU - Yifat, Yuval

AU - Iluz, Zeev

AU - Eitan, Michal

AU - Friedler, Inbal

AU - Hanein, Yael

AU - Boag, Amir

AU - Scheuer, Jacob

N1 - Funding Information: This work has been partially supported by the Israeli DoD and by Tel-Aviv University Advanced Communication Center.

PY - 2012/3/12

Y1 - 2012/3/12

N2 - 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.

AB - 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.

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VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 11

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Quantifying the radiation efficiency of nano antennas

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