Realization of Plasmonic Adaptive Coupler using Curved Multimode Interference Waveguide

Title & Authors
Realization of Plasmonic Adaptive Coupler using Curved Multimode Interference Waveguide
Ho, Kwang-Chun;

Abstract
Nano-scale power splitter based on curved plasmonic waveguides are designed by utilizing the multimode interference (MMI) coupler. To analyze easily the adaptive properties of plasmonic curverd multimode interference coupler(PC-MMIC), the curved form transforms equivalently into a planar form by using conformal transformation method. Also, effective dielectric method and longitudinal modal transmission-line theory are used for simulating the light propagation and optimizing the structural parameters at 3-D guiding geometry. The designed $\small{2{\times}2}$ PC-MMIC does not work well for quasi-TM mode case due to the bending structure, and it does not exist 3dB coupling property, in which the power splitting ratio is 50%:50%, for quasi-TE mode case. Further, the coupling efficiency is better when the signal is incident at channel with large curvature radius than small curvature radius.
Keywords
Plasmonic curved MMI coupler;Power splitting ratio;Equivalent network;
Language
Korean
Cited by
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