(Optical Society of America, 2009) Navarro Cía, Miguel; Beruete Díaz, Miguel; Agrafiotis, Spyros; Falcone Lanas, Francisco; Sorolla Ayza, Mario; Maier, Stefan A.; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
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-subwavelength 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.