title: Coupling of individual quantum emitters to channel plasmons.
abstract: Efficient light-matter interaction lies at the heart of many emerging technologies that seek on-chip integration of solid-state photonic systems. Plasmonic waveguides, which guide the radiation in the form of strongly confined surface plasmon-polariton modes, represent a promising solution to manipulate single photons in coplanar architectures with unprecedented small footprints. Here we demonstrate coupling of the emission from a single quantum emitter to the channel plasmon polaritons supported by a V-groove plasmonic waveguide. Extensive theoretical simulations enable us to determine the position and orientation of the quantum emitter for optimum coupling. Concomitantly with these predictions, we demonstrate experimentally that 42% of a single nitrogen-vacancy centre emission efficiently couples into the supported modes of the V-groove. This work paves the way towards practical realization of efficient and long distance transfer of energy for integrated solid-state quantum systems.
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.
authors.forename: Esteban
authors.initials: E
authors.lastname: Bermúdez-Ureña
authors.affiliation: Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, ES-28049 Madrid, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Gonzalez-Ballestero
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.
authors.forename: Michael
authors.initials: M
authors.lastname: Geiselmann
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.
authors.forename: Renaud
authors.initials: R
authors.lastname: Marty
authors.affiliation: Department of Technology and Innovation, University of Southern Denmark, Niels Bohr Allé 1, DK-5230 Odense M, Denmark.
authors.forename: Ilya P
authors.initials: IP
authors.lastname: Radko
authors.affiliation: Department of Physics and Nanotechnology, Aalborg University, Skjernvej 4A, DK-9220 Aalborg Øst, Denmark.
authors.forename: Tobias
authors.initials: T
authors.lastname: Holmgaard
authors.affiliation: The Nanoscience Centre, University of Cambridge, 11 JJ Thomson Avenue, Cambridge CB3 0FF, UK.
authors.forename: Yury
authors.initials: Y
authors.lastname: Alaverdyan
authors.affiliation: Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, ES-28049 Madrid, Spain.
authors.forename: Esteban
authors.initials: E
authors.lastname: Moreno
authors.affiliation: Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, ES-28049 Madrid, Spain.|Donostia International Physics Center (DIPC), E-20018 Donostia/San Sebastian, Spain.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: García-Vidal
authors.affiliation: Department of Technology and Innovation, University of Southern Denmark, Niels Bohr Allé 1, DK-5230 Odense M, Denmark.
authors.forename: Sergey I
authors.identifier: http://orcid.org/0000-0002-0393-4859
authors.initials: SI
authors.lastname: Bozhevolnyi
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.|ICREA-Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, 08010 Barcelona, Spain.
authors.forename: Romain
authors.initials: R
authors.lastname: Quidant