| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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A Trade-off between Propagation Length and Light Confinement in Cylindrical Metal-Dielectric Waveguides |
| SUN Bao-Qing, GU Ying**, HU Xiao-Yong, GONG Qi-Huang**
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State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871
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| Cite this article: |
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SUN Bao-Qing, GU Ying, HU Xiao-Yong et al 2011 Chin. Phys. Lett. 28 057303 |
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Abstract 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 120–200λ with 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.
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| Keywords:
73.20.Mf
78.67.-n
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Received: 17 April 2010
Published: 26 April 2011
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| PACS: |
73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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