HUI-HSIN HSIAOHuang H.-F.SI-CHEN LEEHUNG-CHUN CHANG2022-09-192022-09-19201219430655https://www.scopus.com/inward/record.uri?eid=2-s2.0-84863366084&doi=10.1109%2fJPHOT.2012.2188787&partnerID=40&md5=a9c29d4811be29ff70e8bcfa26053068https://scholars.lib.ntu.edu.tw/handle/123456789/621138By 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.apertures; diffraction; infrared; Surface plasmons; Wood's anomalies (WAs)[SDGs]SDG112D-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 excitationjournal article10.1109/JPHOT.2012.21887872-s2.0-84863366084