Compact dual-band terahertz quarter-wave plate metasurface

Research output: Contribution to journalArticlepeer-review

Authors

  • Victor Torres
  • Nuria Sánchez
  • David Etayo
  • Ruben Ortuño
  • Alejandro Martínez
  • Miguel Beruete

Colleges, School and Institutes

External organisations

  • Universidad Pública de Navarra
  • Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia

Abstract

A dual-band quarter-wave plate based on a modified extraordinary transmission hole array is numerically analyzed and experimentally demonstrated at terahertz frequencies. To control independently orthogonal polarizations, the original square holes are connected with vertical slits and their lateral straight sides are replaced by meander lines. This smart design enables dual-band operation with unprecedented fractional bandwidths in a compact structure. Considering a flattening deviation lower than 40% of the optimum value, a fractional bandwidth of 53.8% and 3.8% is theoretically obtained (16.8% and 2.9% in the experiment) at 1 and 2.2 THz, respectively. At these two frequencies, the structure is 0.13- λ) and 0.29- λ) thick, respectively. Given the compactness of the whole structure and the performance obtained, this quarter-wave plate is presented as a competitive device for the terahertz band.

Details

Original languageEnglish
Article number6834827
Pages (from-to)1679-1682
Number of pages4
JournalIEEE Photonics Technology Letters
Volume26
Issue number16
Publication statusPublished - 15 Aug 2014

Keywords

  • birefringence, extraordinary transmission, metasurface, Quarter-wave plate, terahertz applications