title: Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances.
abstract: We report on a novel metamaterial structure that sustains extremely sharp resonances in the terahertz domain. This system involves two conductively coupled split ring resonators that together exhibit a novel resonance, in broad analogy to the antiphase mode of the so-called Huygens coupled pendulum. Even though this resonance is in principle forbidden in each individual symmetric split ring, our experiments show that this new coupled mode can sustain quality factors that are more than one order of magnitude larger than those of conventional split ring arrangements. Because of the universality of the metamaterial response, the design principle we present here can be applied across the entire electromagnetic spectrum and to various metamaterial resonators.
authors.affiliation: INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada.
authors.forename: Ibraheem
authors.initials: I
authors.lastname: Al-Naib
authors.affiliation: Institute of Condensed Matter Theory and Solid State Optics and Abbe Center of Photonics, Friedrich-Schiller-Universität, Jena 07743, Germany.
authors.forename: Erik
authors.initials: E
authors.lastname: Hebestreit
authors.affiliation: Institute of Condensed Matter Theory and Solid State Optics and Abbe Center of Photonics, Friedrich-Schiller-Universität, Jena 07743, Germany.
authors.forename: Carsten
authors.initials: C
authors.lastname: Rockstuhl
authors.affiliation: Institute of Condensed Matter Theory and Solid State Optics and Abbe Center of Photonics, Friedrich-Schiller-Universität, Jena 07743, Germany.
authors.forename: Falk
authors.initials: F
authors.lastname: Lederer
authors.affiliation: CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, USA.
authors.forename: Demetrios
authors.initials: D
authors.lastname: Christodoulides
authors.affiliation: INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada.
authors.forename: Tsuneyuki
authors.initials: T
authors.lastname: Ozaki
authors.affiliation: INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada.
authors.forename: Roberto
authors.initials: R
authors.lastname: Morandotti