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A Distributed Circuit Model for Side-Coupled Nanoplasmonic Structures With Metal–Insulator–Metal Arrangement

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7 Author(s)
Mohsen Rezaei ; Electrical Engineering Department , Sharif University of Technology, Tehran, Iran ; Sadegh Jalaly ; Mehdi Miri ; Amin Khavasi
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A transmission line model is developed for coupled plasmonic metal-insulator-metal (MIM) waveguides. In the proposed model coupling between electric fields of two plasmonic waveguides is modeled by distributed mutual capacitor while distributed mutual inductor accounts for magnetic field coupling. These mutual elements are determined using propagation constants of supermodes of coupled waveguides. The model is applied to analyze coupled line directional coupler and side-coupled rectangular resonators. The effectiveness of the model is assessed using fully numerical finite-difference time-domain (FDTD) technique. The results have excellent agreement with the numerical methods.

Published in:

IEEE Journal of Selected Topics in Quantum Electronics  (Volume:18 ,  Issue: 6 )