Metal-Coated Silicon Nanowire Plasmonic Waveguides

We report that a metal-coated silicon nanowire functions as a plasmonic waveguide. Measurements showed that plasmonic waveguide modes propagated efficiently through a chemically synthesized silicon nanowire with a diameter of ${\sim}80$ nm coated with silver. The propagation lengths for transverse-m...

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Bibliographic Details
Published in:Applied physics express 2013-04, Vol.6 (4), p.042502-042502-4
Main Authors: Hwang, Yongsop, Hwang, Min-Soo, Lee, Won Woo, Park, Won Il, Park, Hong-Gyu
Format: Article
Language:English
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Summary:We report that a metal-coated silicon nanowire functions as a plasmonic waveguide. Measurements showed that plasmonic waveguide modes propagated efficiently through a chemically synthesized silicon nanowire with a diameter of ${\sim}80$ nm coated with silver. The propagation lengths for transverse-magnetic and transverse-electric modes were estimated to be ${\sim}8.05$ and ${\sim}6.61$ μm, respectively. Numerical simulations of the propagation length and mode profile of each plasmonic waveguide mode agreed with the experimental results. These plasmonic waveguides with highly smooth surfaces, fabricated through a bottom-up approach, represent a meaningful step toward the demonstration of an ultracompact subwavelength-scale plasmonic integrated circuit.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.6.042502