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In this paper a novel metal-dielectric waveguide structure is proposed to support hybrid long range surface plasmon polaritons (LRSPPs) with a highly confined mode field. The simulation results showed that our proposed structure has better mode confinement and propagation length compared to that of conventional dielectric-loaded surface plasmon polaritons (DLSPPs) waveguides. This structure offers greater flexibility for the design of SPPs waveguides by altering the trade-off between mode confinement and propagation length. The proposed structure has significant potential for application in highly integrated photonic circuits.
Ma, Y., Farrell, G., Semenova, Y., Chan, H., Zhang, H. and Wu, Q. Novel dielectric loaded plasmonic waveguide for tight-confined hybrid plasmon mode. Plasmonics, vol. 8, pp. 1259-1263, 2013. DOI: 10.1007/s11468-013-9543-9.