We theoretically investigate the hybrid plasmonic modes of cylindrical nanocables with gold nanocore and two dielectric nanolayers(SiO2 and BN).By solving a complete set of Maxwell's equations,the propagation cons...We theoretically investigate the hybrid plasmonic modes of cylindrical nanocables with gold nanocore and two dielectric nanolayers(SiO2 and BN).By solving a complete set of Maxwell's equations,the propagation constants and effective radii depending on geometrical parameters are numerically calculated.By declining a trade-off between propagation length and light confinement,high quality hybrid modes which can travel a long range of 120-200λwith a subwavelength effective radius are obtained at the optical wavelength.These modes in one-dimensional cylindrical waveguides should have potential applications in nanoscale optical device designs.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10874004 and 10821062National Basic Research Program of China under Grant No 2007CB307001.
文摘We theoretically investigate the hybrid plasmonic modes of cylindrical nanocables with gold nanocore and two dielectric nanolayers(SiO2 and BN).By solving a complete set of Maxwell's equations,the propagation constants and effective radii depending on geometrical parameters are numerically calculated.By declining a trade-off between propagation length and light confinement,high quality hybrid modes which can travel a long range of 120-200λwith a subwavelength effective radius are obtained at the optical wavelength.These modes in one-dimensional cylindrical waveguides should have potential applications in nanoscale optical device designs.
