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Calculation of waveguide modes in linear chains of metallic nanorods |
JOSA B, Vol. 29, Issue 4, pp. 827-832 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000827
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Abstract
We report on the calculation of the fundamental plasmon waveguide modes in linear periodic chains of finite silver nanorods, aligned perpendicular to the chain. The results of rigorous full-electrodynamic calculations by the layer-multiple-scattering method are discussed in conjunction with the results of the widely used coupled-dipole model and a critical evaluation of the latter is provided. More specifically, it is shown that both diameter and height of the nanorods must be much smaller than the interparticle distance; otherwise, for relatively long nanorods close to each other, the coupled-dipole model can fail completely to predict the waveguide dispersion diagram. Moreover, the model systematically underestimates the effect of dissipative losses and cannot describe the effect of a supporting substrate, which is always present in realistic cases and induces considerable changes in the waveguide dispersion diagram.
© 2012 Optical Society of America
OCIS Codes
(130.3130) Integrated optics : Integrated optics materials
(230.7370) Optical devices : Waveguides
(250.5403) Optoelectronics : Plasmonics
ToC Category:
Optoelectronics
History
Original Manuscript: January 13, 2012
Manuscript Accepted: January 31, 2012
Published: March 30, 2012
Citation
Christos Tserkezis and Nikolaos Stefanou, "Calculation of waveguide modes in linear chains of metallic nanorods," J. Opt. Soc. Am. B 29, 827-832 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-4-827
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