期刊
OPTICS EXPRESS
卷 17, 期 12, 页码 10327-10334出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.010327
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- Danish Agency for Science, Technology and Innovation [274-07-0258]
Using the effective-index approximation along with the explicit expression for the propagation constant of gap surface plasmons established recently [Opt. Express 16, 2676-2684 (2008)], we develop an analytic description of channel plasmon polariton (CPP) modes guided along V-grooves and gaps between two metal cylindrical surfaces. The results obtained for V-grooves are compared with those reported previously. Dispersion of the main CPP characteristics is calculated for air-gold configurations, allowing one to design graded-gap waveguides for the single-mode operation supporting well-confined fundamental CPP modes in a broad wavelength range. (c) 2009 Optical Society of America
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