Document Type : Research
Authors
1 Department of Electrical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2 Shahid Chamran University of Ahvaz
Abstract
In this research, using graphene nano-ribbons on silicon dioxide, a plasmonic channel with high confinement has been designed for guiding surface plasmon polaritons. By adjusting the chemical potential of graphene, the channel's conductivity can be controlled. Simulation results show that by applying voltages of 1.5 and 8.3 volts to graphene nano-ribbons can obtained chemical potentials of 0.1 and 0.5 electron volts, and change the channel losses from 88.23 to 0.91 dB/μm. Accordingly, two logical states of zero and one and key switching operation can be realized. The figure-of-merit of 975.43 shows that there is a good ratio between the confinement of surface plasmons and their propagation loss. The coupling length of 99.1 μm shows that the power leakage to adjacent channel can be controlled and the small size of the proposed decoder, which is equal to 1.92 μm2 shows the importance of power leakage control. The discrimination ratio of the decoder is 45.73 dB, demonstrating the ability of the device to distinguish logical levels of one and zero. Comparison of the structure obtained in this research with other works confirms that the proposed design has been able to improve the performance of the optical decoder.
Keywords
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