Investigating Far-Field Spectra and Near-Field Features of Extraordinary Optical Transmission Through Periodic U- to H-Shaped Apertures

Investigating Far-Field Spectra and Near-Field Features of Extraordinary Optical Transmission Through Periodic U- to H-Shaped Apertures

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 transmis...

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Bibliographic Details
Main Authors: Hui-Hsin Hsiao, Hao-Fu Huang, Si-Chen Lee, Hung-Chun Chang
Format: Article
Language:English
Published: IEEE 2012-01-01
Series:IEEE Photonics Journal
Subjects:
Surface plasmons
Wood's anomalies (WAs)
apertures
diffraction
infrared
Online Access:https://ieeexplore.ieee.org/document/6156512/
Description
Summary: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.
ISSN:1943-0655

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