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Nonlinear nanofocusing in tapered plasmonic waveguides

Davoyan, Artur; Shadrivov, Ilya; Zharov, Alexander; Gramotnev, Dmitri; Kivshar, Yuri


We suggest using tapered waveguides for compensating losses of surface plasmon-polaritons in order to enhance nonlinear effects at the nanoscale. We study nonlinear plasmon self-focusing in tapered metal-dielectric-metal slot waveguides and demonstrate that, by an appropriate choice of the taper angle, we can effectively suppress the mode attenuation achieving stable propagation of a spatial plasmon soliton. For larger tapering angles we observe plasmon-beam nanofocusing in both spatial...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.105.116804


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