Title :
Investigating Far-Field Spectra and Near-Field Features of Extraordinary Optical Transmission Through Periodic U- to H-Shaped Apertures
Author :
Hsiao, Hui-Hsin ; Huang, Hao-Fu ; Lee, Si-Chen ; Chang, Hung-chun
Author_Institution :
Grad. Inst. of Photonics & Optoelectron., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
4/1/2012 12:00:00 AM
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.
Keywords :
finite difference time-domain analysis; metallic thin films; surface plasmon resonance; ultraviolet spectra; FDTD; Wood anomalies; enhanced transmission; extraordinary optical transmission; far field spectra; in-house finite difference time-domain program; metallic film; near field features; periodic H-shaped holes; periodic U-shaped holes; shape resonances; surface electromagnetic modes; transmission spectral profiles; Apertures; Arrays; Educational institutions; Metals; Shape; Silicon; Surface waves; Surface plasmons; Wood´s anomalies (WAs); apertures; diffraction; infrared;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2012.2188787
