, Volume 8, Issue 2, pp 1123-1128

Easy-to-Design Nano-Coupler Between Metal–Insulator–Metal Plasmonic and Dielectric Slab Waveguides

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Abstract

An easy-to-design single-stub nano-coupler is proposed to increase the direct coupling efficiency between metal–insulator–metal (MIM) plasmonic and high-index dielectric waveguides. The modal reflection and transmission from the junction are exploited to provide a circuit description for the structure. The return loss of direct coupling is then minimized by loading the MIM waveguide with a single stub. Numerical examples are given, and the accuracy of the model is examined via finite-difference time-domain method.