Investigating far-field spectra and near-field features of extraordinary optical transmission through periodic U- to H-shaped apertures
Journal
IEEE Photonics Journal
Journal Volume
4
Journal Issue
2
Pages
387-398
Date Issued
2012
Author(s)
Abstract
By exploiting the in-house finite-difference time-domain (FDTD) program, the optical properties of a designated 2-D array of U- to H-shaped holes perforated on a metallic film are analyzed. Some specific near-field features are found to be associated with the three mechanisms underlying the transmission spectral profiles, namely, excitation of surface electromagnetic (EM) modes, Wood's anomalies (WAs), and shape resonances (SRs), thus providing a way to reveal the physical nature of the enhanced transmission phenomenon. © 2009 IEEE.
Subjects
apertures; diffraction; infrared; Surface plasmons; Wood's anomalies (WAs)
SDGs
Other Subjects
2D-arrays; apertures; Enhanced transmission; Extraordinary optical transmission; Far field spectra; Finite difference time-domain; H-shaped; H-shaped aperture; Near-field; Physical nature; Shape resonance; Spectral profile; Surface plasmons; Wood's anomalies; Wood's anomalies (WAs); Diffraction; Finite difference time domain method; Infrared radiation; Optical properties; Electric excitation
Type
journal article