Mimicking glide-symmetry dispersion with coupled slot metasurfaces (article)
Camacho Aguilar, Miguel
Mitchell-Thomas, Rhiannon C.
Hibbins, Alastair P.
Applied Physics Letters
In this Letter we demonstrate that the dispersion properties associated with glide symmetry can be achieved in systems that only possess reflection symmetry by balancing the influence of two sub-lattices. We apply this approach to a pair of coupled slots cut into an infinite perfectly conducting plane. Each slot is notched on either edge, with the complete two-slot system having only mirror symmetry. By modifying the relative size of the notches on either side of the slots, we show that a linear dispersion relation with a degeneracy with non-zero group velocity at the Brillouin zone boundary can be achieved. These properties, until now, only found in systems with glide symmetry are numerically and experimentally validated. We also show that these results can be used for the design of ultra-wideband one-dimensional leaky wave antennas in coplanar waveguide technology.
The authors wish to acknowledge financial support from the Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom, via the EPSRC Centre for Doctoral Training in Metamaterials (Grant No. EP/L015331/1).
This is the author accepted manuscript. The final version is available from AIP Publishing via the DOI in this record.
The dataset associated with this article is in ORE at http://hdl.handle.net/10871/29285
Vol. 111, article 121603