Journal
OPTICS COMMUNICATIONS
Volume 279, Issue 2, Pages 384-389Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2007.07.017
Keywords
nanoshells; plasmonic waveguides; dipole approximation
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Coupled plasmon modes have been studied theoretically in periodic chains of nanoshell particles embedded in a graded dielectric host. These chains not only sustain a variety of localized modes as unshelled nanoparticle chains, but also offer precise control of the localization-delocalization transition among these modes by varying the permittivity contrast and/or core-shell radius ratio. By optimizing these parameters, the upper band can be tuned into higher frequencies while the lower band can be tuned into the optical communication frequencies for practical application. We also discuss the Ohmic loss effects in the metallic component of the nanoshells. (c) 2007 Elsevier B.V. All rights reserved.
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