title: Broadband spoof plasmons and subwavelength electromagnetic energy confinement on ultrathin metafilms.
abstract: A complementary split ring resonator (CSRR)-based metallic layer is proposed as a route to mimic surface plasmon polaritons. A numerical analysis of the textured surface is carried out and compared to previous prominent topologies such as metal mesh, slit array, hole array, and Sievenpiper mushroom surfaces, which are studied as well from a transmission line perspective. These well-documented geometries suffer from a narrowband response, alongside, in most cases, metal thickness constraint (usually of the order of lambda/4) and non-subwavelength modal size as a result of the large dimensions of the unit cell (one dimensions is at least of the order of lambda/2). All of these limitations are overcome by the proposed CSRR-based surface. Besides, a planar waveguide is proposed as a proof of the potential of this CSRR-based metallic layer for spoof surface plasmon polariton guiding. Fundamental aspects aside, the structure under study is easy to manufacture by simple PCB techniques and it is expected to provide good performance within the frequency band from GHz to THz.
authors.affiliation: Millimeter and Terahertz Waves Laboratory, Universidad Pública de Navarra, Campus Arrosadía, 31006 Pamplona, Spain. miguel.navarro@unavarra.es
authors.forename: Miguel
authors.initials: M
authors.lastname: Navarro-Cía
authors.forename: Miguel
authors.initials: M
authors.lastname: Beruete
authors.forename: Spyros
authors.initials: S
authors.lastname: Agrafiotis
authors.forename: Francisco
authors.initials: F
authors.lastname: Falcone
authors.forename: Mario
authors.initials: M
authors.lastname: Sorolla
authors.forename: Stefan A
authors.initials: SA
authors.lastname: Maier
mesh_terms: D003198:Computer Simulation; D004574:Electromagnetic Fields; D004735:Energy Transfer; D008027:Light; D008567:Membranes, Artificial; D008670:Metals; D008962:Models, Theoretical; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D008670:Metals