Design and analysis of a phase modulator based on a metal-polymer-silicon hybrid plasmonic waveguide |
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Authors: | Sun Xiaomeng Zhou Linjie Li Xinwan Hong Zehua Chen Jianping |
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Affiliation: | State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. |
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Abstract: | A plasmonic-hybrid-waveguide-based optical phase modulator is proposed and analyzed. The field enhancement in the low-index high-nonlinear polymer layer provides nanoscale optical confinement and a fast optical modulation speed. At 2.5 V drive voltage, a π phase shift can be obtained for a 13-μm-long plasmonic waveguide. Because of its small capacitance and parasitic resistance, the modulation bandwidth can reach up to 100 GHz with a low power consumption of ~9 fJ/bit. The plasmonic waveguide is connected to a silicon wire waveguide via an adiabatic taper with a coupling efficiency of ~91%. The phase modulator can find potential applications in optical telecommunication and interconnects. |
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