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Surface Plasmon Effects Excited by the Dielectric Hole in a Silver-Shell Nanospherical Pair

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Abstract

Using the finite-element method, the surface plasmon effects in a three-dimensional silver-shell nanospherical pair with five different dielectric holes (DHs) that interact with a transverse magnetic mode incident plane wave are investigated. The proposed structure exhibits a red-shifted localized surface plasmon that can be tuned over an extended wavelength range by varying the dielectric constant and the radii in DHs. The increase in the near-field intensity is attributed to a larger effective size of DH that is filled with a higher refractive index medium. The predictive character of these calculations allows one to tailor the shape of the nanoparticle to achieve excitation spectra on demand with a controlled field enhancement.

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Acknowledgements

The author is thankful for the financial support from National Science Council, Taiwan, ROC, under Grant number NSC 96-2112-M-231-001-MY3 and NSC-97-2120-M-002-013.

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  1. Department of Electronic Engineering, Ching Yun University, Jung-Li, Taiwan, 320, Republic of China

    Yuan-Fong Chau

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  1. Yuan-Fong Chau
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Correspondence to Yuan-Fong Chau.

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Chau, YF. Surface Plasmon Effects Excited by the Dielectric Hole in a Silver-Shell Nanospherical Pair. Plasmonics 4, 253–259 (2009). https://doi.org/10.1007/s11468-009-9100-8

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  • DOI: https://doi.org/10.1007/s11468-009-9100-8

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