All-metallic epsilon-near-zero graded-index converging lens at terahertz frequencies

Victor Pacheco-Peña, Nader Engheta, Sergei Kuznetsov, Alexandr Gentselev, Miguel Beruete

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

Abstract

In this communication, an all-metallic epsilon-near-zero graded-index lens is demonstrated working at terahertz (THz) frequencies. The lens is designed using an array of narrow hollow rectangular waveguides working near cut-off of their fundamental mode emulating an epsilon-near-zero medium. The prototype is evaluated both experimentally and numerically demonstrating a good agreement between them with a focal length of 6 mm at the frequency of 0.675 THz. An experimental power enhancement at the focal length of 42 times is achieved compared to the case without the lens. The results presented here may open doors to the design of novel devices within the terahertz frequency range using such artificial metastructures.

Original languageEnglish
DOIs
Publication statusPublished - 1 Jan 2018
Event12th European Conference on Antennas and Propagation, EuCAP 2018 - London, United Kingdom
Duration: 9 Apr 201813 Apr 2018

Conference

Conference12th European Conference on Antennas and Propagation, EuCAP 2018
CountryUnited Kingdom
CityLondon
Period09.04.201813.04.2018

Keywords

  • Epsilon-near-zero
  • Lenses
  • Metamaterials
  • Terahertz

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