Numerical and experimental parametric analysis of anomalous enhanced transmission through subwavelength apertures

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

External organisations

  • Universidad Pública de Navarra

Abstract

Here, we present a numerical and experimental parametric analysis of anomalous enhanced transmission supported by dielectric-loaded holey metals. We focus the study on circular and square subwavelength hole apertures (arranged in a rectangular lattice) both under normal and oblique incidence within the millimetre-wave regime. It is experimentally confirmed that the thickness of the dielectric slab plays a role: the thicker the slab is, the higher the transmission is, which is in good agreement with the interpretation founded on grounded dielectric slab mode and circuit models. Also, from the experimental results, it is shown that finiteness effects arisen in the real experiments have significant consequences. Among them, it is outstanding the considerable penalty on the transmission through circular holes, which can be explained intuitively by the smaller clear aperture per unit area with respect to the square holes. In addition to transmission results, the TE nature of the grounded dielectric slab mode is stressed by the field distribution calculated numerically. The results presented here enlarge the knowledge about anomalous enhanced transmission and establish a platform from which polarization- and frequency-dependent devices can be foreseen.

Details

Original languageEnglish
Pages (from-to)125-134
Number of pages10
JournalMetamaterials
Volume5
Issue number2-3
Publication statusPublished - Jun 2011
EventMetamaterials 2010 - Karlsruhe, Germany
Duration: 13 Sep 201016 Sep 2010

Keywords

  • Anomalous extraordinary transmission, Complex surface wave, Enhanced transmission, Grating, Millimetre-waves