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Table 1 The guiding properties for the four types of metal nanowires with different cross-sectional shapes

From: Asymmetric hybrid plasmonic waveguides with centimeter-scale propagation length under subwavelength confinement for photonic components

Shape n eff Am/ Ao L(μm) FoM
Triangle 1.614819 6.72 × 10-2 1.20 × 104 52825
Square 1.615327 6.99 × 10-2 1.31 × 104 56816
Hexagon 1.614799 6.10 × 10-2 2.17 × 104 100395
Circle 1.614470 4.89 × 10-2 2.69 × 104 139037