TY - JOUR
T1 - Quantifying the radiation efficiency of nano antennas
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.
UR - http://www.scopus.com/inward/record.url?scp=84859959107&partnerID=8YFLogxK
U2 - 10.1063/1.3694278
DO - 10.1063/1.3694278
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AN - SCOPUS:84859959107
SN - 0003-6951
VL - 100
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 11
M1 - 111113
ER -