Compact and Wide-band Hybrid Metal-Insulator Plasmonic Directional Coupler


  • Mahmoud Talafi Noghani Iran University of Science and Technology
  • Mohammad Hashem Vadjed Samiei Iran University of Science and Technology



A compact and wideband plasmonic directional coupler is proposed based on the hybrid metal-insulator slab waveguide (HMISW). Transfer matrix method (TMM) is adopted to analyze the multilayer structure. The hybrid waveguide is composed of a metallic layer of silver and two dielectric layers of silica (SiO2) and silicon (Si) with high index contrast. Coupling length and maximum transferred power are optimized according to dielectric layer thicknesses. It is shown that sub-micron coupling length is achieved with wide bandwidth and high efficiency, being advantageous to conventional directional couplers

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Author Biographies

Mahmoud Talafi Noghani, Iran University of Science and Technology

School of Electrical Engineering

Mohammad Hashem Vadjed Samiei, Iran University of Science and Technology

School of Electrical Engineering




How to Cite

M. Talafi Noghani and M. H. Vadjed Samiei, “Compact and Wide-band Hybrid Metal-Insulator Plasmonic Directional Coupler”, Photonics Lett. Pol., vol. 6, no. 3, pp. pp. 108–110, Sep. 2014.