A novel hybrid plasmonic waveguide with ultra-long propagation distance and confined at the subwavelength scale

Li Xin; Yang Hujiang

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A novel hybrid plasmonic waveguide with ultra-long propagation distance and confined at the subwavelength scale

Li Xin,Yang Hujiang *

School of Science, Beijing University of Posts and Telecommunications, Beijing 100876

*Correspondence author

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Funding: none

Opened online: 7 January 2016

Accepted by: none

Citation: Li Xin,Yang Hujiang.A novel hybrid plasmonic waveguide with ultra-long propagation distance and confined at the subwavelength scale[OL]. [ 7 January 2016] http://en.paper.edu.cn/en_releasepaper/content/4674239

This study reports a novel horizontal symmetric hybrid plasmonic waveguide (HSHPW), which consists of a cylindrical Ag nanowire and high-index dielectric layers Si laying perpendicular to the substrate SiO2. It combines the advantages of hybrid SPP, long-range SPP and wedge mode for the nanoscale confinement and guiding of light on a chip. The waveguide could remarkably minimize the energy attenuation resulting from Ohmic losses while retaining highly confined modes guided in the low-index nanoscale gaps between the Ag nanowire and the high-index Si. The geometric dependence of the mode characteristics on the proposed structure is analyzed in detail, showing long propagation lengths beyond 7.8 mm with normalized mode area about 0.005 and our design also features an overall advantage of large improvement of Figure of Merit (FOM) than any other properties of HPW structures published in recent years. Thus the HSHPW is very helpful for building high-density photonic integrated circuits.

Keywords:surface plasmon polaritons; hybrid plasmonic waveguide; normalized mode areas; propagation lengths; the figure of merit

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