Prediction of transmission shape-resonances in aperture arrays with one- or twofold mirror-symmetry based on a near-field phase property
Journal
IEEE Journal of Quantum Electronics
Journal Volume
50
Journal Issue
4
Pages
287-294
Date Issued
2014
Author(s)
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. © 1965-2012 IEEE.
Subjects
Frequency-selective surfaces; infrared; metamaterials; surface plasmons
SDGs
Other Subjects
Cutoff wavelengths; Degree of freedom; Frequency-selective surfaces; Polarization state; Resonant wavelengths; Separation distances; Simulated results; Surface plasmons; Finite difference time domain method; Forecasting; Infrared radiation; Metamaterials; Mirrors; Light transmission
Type
journal article