Symmetry and finite-size effects in quasi-optical extraordinarily THz transmitting arrays of tilted slots

Miguel Camacho, Ajla Nekovic, Suzanna Freer, Pavel Penchev, Rafael R Boix, Stefan Dimov, Miguel Navarro-Cia*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
119 Downloads (Pure)


Extraordinarily transmitting arrays are promising candidates for quasi-optical (QO) components due to their high frequency selectivity and beam scanning capabilities owing to the leaky-wave mechanism involved. We show here how by breaking certain unit cell and lattice symmetries, one can achieve a rich family of transmission resonances associated with the leaky-wave dispersion along the surface of the array. By combining 2-D and 1-D periodic method of moments (MoM) calculations with QO terahertz (THz) time-domain measurements, we provide physical insights, numerical, and experimental demonstration of the different mechanisms involved in the resonances associated with the extraordinary transmission peaks and how these evolve with the number of slots. Thanks to the THz instrument used, we are also able to explore the time-dependent emission of the different frequency components involved.

Original languageEnglish
Article number9068436
Pages (from-to)6109-6117
Number of pages9
JournalIEEE Transactions on Antennas and Propagation
Issue number8
Early online date15 Apr 2020
Publication statusPublished - Aug 2020

Bibliographical note

Funding Information:
Manuscript received January 9, 2020; revised March 28, 2020; accepted March 31, 2020. Date of publication April 15, 2020; date of current version August 4, 2020. The work of Miguel Camacho was supported by the Engineering and Physical Sciences Research Council (EPSRC) of the U.K. through the EPSRC Center for Doctoral Training in Metamaterials under Grant EP/L015331/1. The work of Suzanna Freer was supported by the EPSRC under Studentship 2137478. The work of Rafael R. Boix was supported by the Ministerio de Ciencia, Innovación y Universidades under Grant TEC2017-84724-P. The work of Miguel Navarro-Cía was supported in part by the EPSRC under Grant EP/S018395/1, in part by the Royal Society under Grant RSG/R1/180040, and in part by the University of Birmingham under Birmingham Fellowship. (Corresponding author: Miguel Navarro-Cía.) Miguel Camacho is with the Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA 19104-6390, USA (e-mail:

Publisher Copyright:
© 1963-2012 IEEE.


  • Extraordinary Transmission
  • Frequency selective surfaces (FSSs)
  • Terahertz
  • Time-domain spectroscopy
  • method of moments (MoM)
  • quasioptical

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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