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Broadband spoof plasmons and subwavelength electromagnetic energy confinement on ultrathin metafilms

Navarro-Cía, M; Beruete, M; Falcone, F; Sorolla, M; Agrafiotis, S; Maier, SA; (2009) Broadband spoof plasmons and subwavelength electromagnetic energy confinement on ultrathin metafilms. Optics Express , 17 (20) 18184 - 18195. 10.1364/OE.17.018184. Gold open access

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 λ/4) and non-sub wavelength modal size as a result of the large dimensions of the unit cell (one dimensions is at least of the order of λ/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.©2009 Optical Society of America.

Type:Article
Title:Broadband spoof plasmons and subwavelength electromagnetic energy confinement on ultrathin metafilms
Open access status:An open access publication
DOI:10.1364/OE.17.018184
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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