Mimicking glide symmetry dispersion with coupled slot metasurfaces
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 sublattices. We apply this approach to a pair of coupled slots cut into an infinite perfectly conducting pla...
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Veröffentlicht in: | Applied physics letters 2017-09, Vol.111 (12) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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 sublattices. 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. |
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ISSN: | 0003-6951 1077-3118 1077-3118 |
DOI: | 10.1063/1.5000222 |