Broadband spoof plasmons and subwavelength electromagnetic energy confinement on ultrathin metafilms

Research output: Contribution to journalArticle

Authors

  • Miguel Beruete
  • Spyros Agrafiotis
  • Francisco Falcone
  • Mario Sorolla
  • Stefan A. Maier

Colleges, School and Institutes

External organisations

  • Imperial College London
  • Universidad Pública de Navarra

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.

Details

Original languageEnglish
Pages (from-to)18184-18195
Number of pages12
JournalOptics Express
Volume17
Issue number20
Publication statusPublished - 28 Sep 2009