https://hal-iogs.archives-ouvertes.fr/hal-00683901Benisty, HenriHenriBenistyLaboratoire Charles Fabry / Naphel - LCF - Laboratoire Charles Fabry - UP11 - Université Paris-Sud - Paris 11 - IOGS - Institut d'Optique Graduate School - CNRS - Centre National de la Recherche ScientifiqueBesbes, MondherMondherBesbesLaboratoire Charles Fabry / Naphel - LCF - Laboratoire Charles Fabry - UP11 - Université Paris-Sud - Paris 11 - IOGS - Institut d'Optique Graduate School - CNRS - Centre National de la Recherche ScientifiqueConfinement and optical properties of the plasmonic inverse-rib waveguideHAL CCSD2012[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics]Benisty, Henri2013-02-19 15:29:582023-03-24 14:52:552013-02-19 16:16:27enJournal articlesapplication/pdf1Plasmonic inverse-rib optical waveguides, consisting of a high-index inverse rib embedded in low-index medium above a flat metallic surface, are investigated under four aspects: (i) the optimal angle θ of the rib sidewall for tight modal confinement is assessed, (ii) the effect of the geometric parameters and the wavelength on propagation losses is given, (iii) we use a 3D simulation to assess how well light from an emitting dipole is captured by such a tightly guiding structure, and (iv) we show that for two such parallel hybrid waveguiding systems, when one of them has added gain, we have a plasmonic version of the PT-symmetric waveguide arrangement, and we additionally show that complex gain is needed to restore a truly exceptional point in its propagation constant evolution.