Physics – Optics
Scientific paper
2009-02-19
Journal of Optics A: Pure and Applied Optics, vol. 11, no. 7, 075003, July 2009
Physics
Optics
13 pages, 3 figures, typos corrected, reference added, text modified
Scientific paper
10.1088/1464-4258/11/7/075003
The fundamental guided dispersion characteristics of guided light in a subwavelength dielectric slit channel embedded by two different plasmonic metals are investigated when varying the gap width. As a result, an overall and salient picture of the guided dispersion characteristics is obtained over a wide spectrum range below and above the plasma frequencies of the two different plasmonic metals, which is important preliminary information for analyzing this type of subwavelength waveguide. In particular, the effects of using two different metals on the guided mode dispersions are emphasized in comparison with the effects of using the same plasmonic metal cladding.
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