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Proceedings Paper

Directive emission from a single subwavelength aperture in a periodically corrugated silver film
Author(s): Filippo Capolino; Rui Qiang; David R. Jackson; Ji Chen
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Paper Abstract

We present here an algorithm to evaluate the field in the near zone produced by a finite-size electromagnetic source in a periodic structure, referred to as the array scanning method (ASM) - FDTD method. Using a frequency-dependent silver permittivity model, obtained from measurement at optical and infrared frequencies, we implemented the corresponding modeling equations in the ASM-FDTD algorithm using the Z-transform technique. The developed algorithm is applied to the study of the enhanced radiation of a magnetic line source in a corrugated silver film, and the results indicate that the enhancement is due to the excitation of a leaky mode. We also show that other waves may be excited by the source depending on its location, and how this affects the radiation pattern.

Paper Details

Date Published: 4 May 2007
PDF: 8 pages
Proc. SPIE 6581, Metamaterials II, 65810E (4 May 2007); doi: 10.1117/12.725948
Show Author Affiliations
Filippo Capolino, Univ. of Siena (Italy)
Univ. of Houston (United States)
Rui Qiang, Univ. of Houston (United States)
David R. Jackson, Univ. of Houston (United States)
Ji Chen, Univ. of Houston (United States)

Published in SPIE Proceedings Vol. 6581:
Metamaterials II
Vladimir Kuzmiak; Peter Markos; Tomasz Szoplik, Editor(s)

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