Prediction of transmission shape-resonances in aperture arrays with one- or twofold mirror-symmetry based on a near-field phase property

Hui Hsin Hsiao, Hung Chun Chang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The light-transmission resonant behavior of complex-shaped patterns can be difficult to estimate intuitively due to many possible resonant contours. In this paper, we propose a simple method to predict the effective resonant paths of onefold or twofold mirror-symmetry patterns, which exploits the antiphase property of certain field component along the resonant path and the symmetry requirement associated with the incident-wave polarization state. In addition, the resonant wavelengths for aperture-type patterns can further be estimated by a simple modified cutoff wavelength equation for a rectangular waveguide. Such prediction is validated by the simulated results of the finite-difference time domain method. In addition, we discuss how the separation distance between slit elements in the aperture affects the resonant wavelength, showing how the coupling between adjacent slits would play a role in the variation of the spectra. By studying the properties of such factors and how they interact in detail, we could manipulate the spectra with an additional degree of freedom, which could be important to structures with multielements in one unit cell.

Original languageEnglish
Article number6736077
Pages (from-to)287-294
Number of pages8
JournalIEEE Journal of Quantum Electronics
Volume50
Issue number4
DOIs
Publication statusPublished - Apr 2014
Externally publishedYes

Keywords

  • Frequency-selective surfaces
  • infrared
  • metamaterials
  • surface plasmons

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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