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

Research output: Contribution to journalArticle

Authors

  • Miguel Camacho
  • Ajla Nekovic
  • Suzanna Freer
  • Rafael R Boix

Colleges, School and Institutes

External organisations

  • University of Sarajevo
  • University of Exeter
  • Universidad de Sevilla, Seville, Spain.

Abstract

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 two dimensional and one dimensional periodic Method of Moments (MoM) calculations with QO Terahertz (THz) time domain measurements, we provide physical insight, 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.

Details

Original languageEnglish
Number of pages9
JournalIEEE Transactions on Antennas and Propagation
Early online date15 Apr 2020
Publication statusE-pub ahead of print - 15 Apr 2020

Keywords

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