28 September 2007 Plasmonic modes in periodic metal nanoparticle structures
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We apply an efficient eigen-decomposition method to analyze the plasmonic modes in metal nanoparticle structures. The proposed method has the advantage of simultaneously showing the dispersion relation and the mode quality, and at the same time, it also separates the material properties from the geometrical properties so that its efficiency, therefore, does not depend on the complexity of the material polarizability. We use the method to analyze the guided plasmonic modes of single metal nanoparticle chain and a pair of chains. Closed form solutions for all modes, including in-plane and out-of- plane modes, are given. We discuss the evolution of the dispersion relation as the complexity of the structure increases.
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K. H. Fung, K. H. Fung, C. T. Chan, C. T. Chan, } "Plasmonic modes in periodic metal nanoparticle structures", Proc. SPIE 6642, Plasmonics: Nanoimaging, Nanofabrication, and Their Applications III, 664214 (28 September 2007); doi: 10.1117/12.730190; https://doi.org/10.1117/12.730190


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