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Article Dans Une Revue Journal of the Optical Society of America. A Optics, Image Science, and Vision Année : 2013

Waveguide-coupled nanowire as an optical antenna

Résumé

We study the optical coupling between a gold nanowire and a silver ion-exchanged waveguide, with special emphasis on the nanowire antenna radiation pattern. We measure the radiation patterns of waveguide-coupled gold nanowires with a height of 70 nm and width of 50 or 150 nm in the 450 - 700nm spectral range for TE and TM polarizations. We perform a systematic theoretical study on the wavelength, polarization, nanowire size, and material dependences on the properties of the radiation pattern. We also give some elements concerning absorption and near-field. Experiments and calculations show localized plasmon resonance for the polarization orthogonal to the wire (far-field resonance at 580 nm for the smallest wire and 670 nm for the widest). It is shown that a great variety of radiation patterns can be obtained, together with a high sensitivity to a change of one parameter, particularly near-resonance.
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Dates et versions

hal-01392944 , version 1 (05-11-2016)

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Laurent Arnaud, Aurélien Bruyant, Mickaël Renault, Yassine Hadjar, Rafael Salas-Montiel, et al.. Waveguide-coupled nanowire as an optical antenna. Journal of the Optical Society of America. A Optics, Image Science, and Vision, 2013, 30 (11), pp.2347-2355. ⟨10.1364/JOSAA.30.002347⟩. ⟨hal-01392944⟩
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