Citrin DS. Plasmon-polariton transport in metal-nanoparticle chains embedded in a gain medium.
OPTICS LETTERS 2006;
31:98-100. [PMID:
16419890 DOI:
10.1364/ol.31.000098]
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Abstract
Plasmon-polariton transport on chains of noncontacting noble-metal nanoparticles suffers from severe attenuation. A possible way of countering the attenuation by embedding the nanoparticle chain in an optical-gain medium is considered. It is found that short-wavelength surface polaritons can acquire exponential growth that can counter nonradiative loss. This is most pronounced for modes polarized transverse to the chain axis immediately outside the light line; this growth factor is likely to be sufficient to counterbalance losses and so lead to low-attenuation propagation of plasmon polaritons in nanoparticle chains.
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