Chin. Phys. Lett.  2011, Vol. 28 Issue (5): 057303    DOI: 10.1088/0256-307X/28/5/057303
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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**
State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871
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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.
Keywords: 73.20.Mf      78.67.-n     
Received: 17 April 2010      Published: 26 April 2011
PACS:  73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))  
  78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/28/5/057303       OR      https://cpl.iphy.ac.cn/Y2011/V28/I5/057303
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SUN Bao-Qing
GU Ying
HU Xiao-Yong
GONG Qi-Huang
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