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Sensors 2011, 11(9), 9109-9120; doi:10.3390/s110909109
Article

Impact of the Excitation Source and Plasmonic Material on Cylindrical Active Coated Nano-Particles

1,* , 1
,
2
 and
3
1 Department of Electrical Engineering, Electromagnetic Systems, Technical University of Denmark, Ørsteds Plads, Bldg. 348, Kgs. Lyngby DK-2800, Denmark 2 Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Bldg. 343, Kgs. Lyngby DK-2800, Denmark 3 Department of Electrical and Computer Engineering, University of Arizona, 1230 E. Speedway Blvd. Tucson, AZ 85721, USA
* Author to whom correspondence should be addressed.
Received: 23 July 2011 / Revised: 23 August 2011 / Accepted: 20 September 2011 / Published: 21 September 2011
(This article belongs to the Special Issue Metamaterials for Sensing)
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Abstract

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.
Keywords: core-shell nano-particles; plasmonics; sensors core-shell nano-particles; plasmonics; sensors
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Arslanagic, S.; Liu, Y.; Malureanu, R.; Ziolkowski, R.W. Impact of the Excitation Source and Plasmonic Material on Cylindrical Active Coated Nano-Particles. Sensors 2011, 11, 9109-9120.

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