Impact of the excitation source and plasmonic material on cylindrical active coated nano-particles

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Journal Article
Sensors, 2011, 11 (9), pp. 9109 - 9120
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Electromagnetic properties of cylindrical active coated nano-particles comprised of a silica nano-cylinder core layered with a plasmonic concentric nano-shell are investigated for potential nano-sensor applications. Particular attention is devoted to the near-field properties of these particles, as well as to their far-field radiation characteristics, in the presence of an electric or a magnetic line source. A constant frequency canonical gain model is used to account for the gain introduced in the dielectric part of the nano-particle, whereas three different plasmonic materials (silver, gold, and copper) are employed and compared for the nano-shell layers. © 2011 by the authors; licensee MDPI, Basel, Switzerland.
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