Dipole‐slot‐dipole metasurfaces

Abstract

A complementary frequency selective surface (CFSS) can be formed on the basis of Babinet's principle. It consists of an array of slots separated from an array of dipoles by a thin dielectric substrate. This study shows that by adding an extra layer of dipoles to a CFSS capacitance can be added to the structure, which leads to a decrease in its resonant frequency. This new structure is called a dipole-slot-dipole metasurface (MTS) and it has unit-cell dimensions of l/10 × l/10 × l/333, where l is representing the free space wavelength. The dipole-slot-dipole MTS has been fabricated and measured. The study also reports on its equivalent circuit; and the effects of the length of the dipoles on the added layer and their alignment on the pass band resonant frequency of the dipole-slot-dipole MTS.

Complementary Metasurfaces for Guiding Electromagnetic Wave

“…Here, we instead impose the condition that the two metasurfaces are complementary with respect to each other. It is worth noting that some attention has been paid to the scattering characteristics of two parallel complementary sheets placed in close proximity of each other [36][37][38][39]. However, to the best of our knowledge, there is not enough knowledge on eigenmodes of coupled complementary metasurfaces operating as a single waveguiding structure.…”