title: Waveguide-coupled nanowire as an optical antenna.
abstract: 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 450-700 nm 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.
authors: Laurent
authors: L
authors: Arnaud
authors: Aurélien
authors: A
authors: Bruyant
authors: Mikael
authors: M
authors: Renault
authors: Yassine
authors: Y
authors: Hadjar
authors: Rafael
authors: R
authors: Salas-Montiel
authors: Aniello
authors: A
authors: Apuzzo
authors: Gilles
authors: G
authors: Lérondel
authors: Alain
authors: A
authors: Morand
authors: Pierre
authors: P
authors: Benech
authors: Etienne
authors: E
authors: Le Coarer
authors: Sylvain
authors: S
authors: Blaize