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Proceedings Paper

Impact of surface waves on the electromagnetic enhancement by a metallic nano-cavity
Author(s): Haitao Liu; Zhiwen Zeng
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Paper Abstract

To investigate the impact of surface waves on the electromagnetic enhancement, here we consider a simple geometry of a T-shaped metallic nano-groove that is composed of a narrow central groove and of a wide top trench under illumination by a plane wave. The T-shaped groove is found to have a much higher enhancement factor than a single bare groove without the top trench. By building up an intuitive surface-wave model, the improved field enhancement is attributed to the surface waves that are collected by the top trench and are coupled into the central groove.

Paper Details

Date Published: 26 November 2012
PDF: 4 pages
Proc. SPIE 8556, Holography, Diffractive Optics, and Applications V, 85560D (26 November 2012); doi: 10.1117/12.999873
Show Author Affiliations
Haitao Liu, Nankai Univ. (China)
Zhiwen Zeng, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 8556:
Holography, Diffractive Optics, and Applications V
Yunlong Sheng; Chongxiu Yu; Linsen Chen, Editor(s)

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