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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18 September 2017
Research Article|
September 20 2017
Mimicking glide symmetry dispersion with coupled slot metasurfaces
Miguel Camacho
;
Miguel Camacho
a)
1
Electromagnetic and Acoustic Materials Group, Department of Physics and Astronomy, University of Exeter
, Stocker Road, Exeter EX4 4QL, United Kingdom
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Rhiannon C. Mitchell-Thomas;
Rhiannon C. Mitchell-Thomas
1
Electromagnetic and Acoustic Materials Group, Department of Physics and Astronomy, University of Exeter
, Stocker Road, Exeter EX4 4QL, United Kingdom
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Alastair P. Hibbins;
Alastair P. Hibbins
1
Electromagnetic and Acoustic Materials Group, Department of Physics and Astronomy, University of Exeter
, Stocker Road, Exeter EX4 4QL, United Kingdom
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J. Roy Sambles
;
J. Roy Sambles
1
Electromagnetic and Acoustic Materials Group, Department of Physics and Astronomy, University of Exeter
, Stocker Road, Exeter EX4 4QL, United Kingdom
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Oscar Quevedo-Teruel
Oscar Quevedo-Teruel
2
Department of Electromagnetic Engineering, KTH Royal Institute of Technology
, SE 100 44, Stockholm, Sweden
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a)
Electronic mail: mc586@exeter.ac.uk
Appl. Phys. Lett. 111, 121603 (2017)
Article history
Received:
August 14 2017
Accepted:
September 10 2017
Citation
Miguel Camacho, Rhiannon C. Mitchell-Thomas, Alastair P. Hibbins, J. Roy Sambles, Oscar Quevedo-Teruel; Mimicking glide symmetry dispersion with coupled slot metasurfaces. Appl. Phys. Lett. 18 September 2017; 111 (12): 121603. https://doi.org/10.1063/1.5000222
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