Radiation pattern of plasmonic nano-antennas in a homogeneous medium | Zendy

Takafumi Sugita | Zendy; Kaori Yanazawa | Zendy; Satoshi Maeda | Zendy; Holger F. Hofmann | Zendy; Yutaka Kadoya | Zendy

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Radiation pattern of plasmonic nano-antennas in a homogeneous medium

Author(s) -

Takafumi Sugita,

Kaori Yanazawa,

Satoshi Maeda,

Holger F. Hofmann,

Yutaka Kadoya

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.013263

Subject(s) - optics , plasmon , radiation , radiation pattern , refractive index , materials science , isotropy , nano , substrate (aquarium) , optoelectronics , physics , antenna (radio) , telecommunications , oceanography , computer science , composite material , geology

Radiation patterns from plasmonic nano-antennas formed on a glass substrate were investigated using index-matching oils. It was confirmed that the pattern from single nano-antennas for various cases of index-mismatching between the substrate and the oil is explained well by the patterns of infinitesimal electric dipoles. We found that for an angular resolution of 2°, the index mismatch must be smaller than 0.001 to realize isotropic radiation. By using the appropriate condition, the radiation patterns of nano Yagi-Uda antennas in a quasi-homogeneous medium were obtained experimentally.

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