Tunable propagation of light through a coupled-bent dielectric-loaded plasmonic waveguides

We numerically show that it is easy to tune, both passively and actively, the transmission power delivered at different output ports of two coupled-bent dielectric-loaded plasmonic waveguides by varying the gap distance and refractive index of driven material between two dielectric stripes. We also investigate the near-field intensity to demonstrate that the power transmitted at different output ports can be varied to realize either equal or unequal levels, depending on the design specifications. A simple expression is proposed to predict the power transmitted to different output ports for a set of given dimensions and refractive index of the driven material.