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Proceedings Paper

Transmission enhancement of light through a metallic nano-slit with periodic metallic nanostrips
Author(s): Yanxia Cui; Yi Jin; Yoichi Okuno; Sailing He
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Paper Abstract

The study of the transmission properties of subwavelength apertures has become a very active area of research in electromagnetism. It is generally accepted that structuring the input surface of the metal film by periodic corrugations is very effective in the process of transmission enhancement through single apertures. Here instead of periodic corrugations, we propose to use periodic nano-strips placed before the input surface of the metal film to enhance the transmission of light through a nano-slit milled in the film. Influences of the structural parameters of periodic nano-strips on the transmission enhancement are investigated. The transmission efficiency through a 25nm-width silver nano-slit can be boosted to be η = 164 when six pairs of nano-strips are placed 50nm distant away from the incident surface of the silver film at λ0 = 1μm, which is originally η = 7.8 without any strips. This indicates that a large part of the incident light can be transformed into the localized guided wave with strong intensity, and then more light can flow through the nano-slit. We emphasize that periodic nano-strips can serve as an efficient receiving antenna to harvest light into the nano-slit.

Paper Details

Date Published: 12 May 2009
PDF: 8 pages
Proc. SPIE 7353, Metamaterials IV, 73530S (12 May 2009); doi: 10.1117/12.819919
Show Author Affiliations
Yanxia Cui, Zhejiang Univ. (China)
Joint Research Ctr. of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang Univ. (China)
Yi Jin, Joint Research Ctr. of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang Univ. (China)
Yoichi Okuno, Kumamoto Univ. (Japan)
Sailing He, Joint Research Ctr. of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 7353:
Metamaterials IV
Vladimir Kuzmiak; Peter Markos; Tomasz Szoplik, Editor(s)

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