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Figure 7 | Nanoscale Research Letters

Figure 7

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

Figure 7

Coupling properties of a directional coupler based on two adjacent AHPMW waveguides. (a) Schematic of the wavelength-selective component, (b) the corresponding 3D |E| evolution, (c) dependence of the mode effective index and the coupling length on the separation, and (d) propagation lengths of the even and odd modes as functions of S.

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