Assesment and Comparison of Three Different Coupling Methods Used to Couple Light into and out of a Sandwiched MDM Plasmonic Waveguide Between Two Dielectric Waveguides

Abstract

A comparison of the performance of air-slot, air-gap, and splitter couplers has been investigated. We found that the splitter coupler achieves higher coupling efficiency, wider spectrum, and better alignment tolerance than the other two couplers.