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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Veröffentlicht in:IEEE photonics journal 2012-04, Vol.4 (2), p.387-398
Hauptverfasser: Hui-Hsin Hsiao, Hao-Fu Huang, Si-Chen Lee, Hung-Chun Chang
Format: Artikel
Sprache:eng
Schlagworte:
Apertures
Arrays
diffraction
Educational institutions
infrared
Metals
Shape
Silicon
Surface plasmons
Surface waves
Wood's anomalies (WAs)
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Zusammenfassung: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
1943-0647
DOI:10.1109/JPHOT.2012.2188787