title: Direct Observation of Optical Field Phase Carving in the Vicinity of Plasmonic Metasurfaces.
abstract: Plasmonic surfaces are mainly used for their optical intensity concentration properties that allow for enhancement of physical interaction like in nonlinear optics, optical sensors, or tweezers. Phase response in plasmonic resonances can also play a major role, especially in a periodic assembly of plasmonic resonators like metasurfaces. Here we show that localized surface plasmons collectively excited by a guided mode in a metallic nanostructure periodic chain present nonmonotonous phase variation along the 1D metasurface, resulting from both selective Bloch mode coupling and dipolar coupling. As shown by near-field measurements, the phase profile of the highly concentrated optical field is carved out in the vicinity of the metallic metasurface, paving the way to unusual local optical functions.
authors.affiliation: IEF, CNRS, Univ Paris-Sud, Université Paris-Saclay , 91405, Orsay, France.
authors.forename: B
authors.initials: B
authors.lastname: Dagens
authors.affiliation: IEF, CNRS, Univ Paris-Sud, Université Paris-Saclay , 91405, Orsay, France.
authors.forename: M
authors.initials: M
authors.lastname: Février
authors.affiliation: IEF, CNRS, Univ Paris-Sud, Université Paris-Saclay , 91405, Orsay, France.
authors.forename: P
authors.initials: P
authors.lastname: Gogol
authors.affiliation: Laboratoire de Nanotechnologie et d'Instrumentation Optique, CNRS-UMR 6279, Université de technologie de Troyes , 12 rue Marie Curie CS 42060, 10004 Troyes cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Blaize
authors.affiliation: Laboratoire de Nanotechnologie et d'Instrumentation Optique, CNRS-UMR 6279, Université de technologie de Troyes , 12 rue Marie Curie CS 42060, 10004 Troyes cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Apuzzo
authors.affiliation: IEF, CNRS, Univ Paris-Sud, Université Paris-Saclay , 91405, Orsay, France.
authors.forename: G
authors.initials: G
authors.lastname: Magno
authors.affiliation: IEF, CNRS, Univ Paris-Sud, Université Paris-Saclay , 91405, Orsay, France.
authors.forename: R
authors.initials: R
authors.lastname: Mégy
authors.affiliation: Laboratoire de Nanotechnologie et d'Instrumentation Optique, CNRS-UMR 6279, Université de technologie de Troyes , 12 rue Marie Curie CS 42060, 10004 Troyes cedex, France.
authors.forename: G
authors.initials: G
authors.lastname: Lerondel
keywords: Plasmonics; localized surface Plasmon; metasurface; near-field scanning optical microscopy; photonic integrated circuits; silicon photonics