Sharif University of Technology Scientia Iranica 1026-3098 24 6 2017 12 01 Terahertz Plasmonic Switch Based on Periodic Array of Graphene/Silicon 3452 3457 4423 10.24200/sci.2017.4423 EN M. Derakhshi School of Electrical and Computer Engineering, Tarbiat Modares University (TMU), Tehran, P.O. Box: 14115-194, Iran D. Fathi School of Electrical and Computer Engineering, Tarbiat Modares University (TMU), Tehran, P.O. Box: 14115-194, Iran Journal Article 2016 08 08 We present a plasmonic switch based on anisotropic structure consisting of graphene and silicon layers, like one-dimensional photonic crystal. The plasmonic wave in this switch is propagated inside the MgF₂ core surrounded by two periodic arrays of  graphene / silicon. Changing the chemical potential of graphene leading to the change of permittivity of anisotropic array, we can adjust the propagation length of plasmonic wave. The obtained results show that, at the frequency of 30 THz with adjusting the chemical potential of graphene, the chemical potential of 0.4 eV and 0.2 eV can be obtained for the ON_state and OFF state, respectively. Also, the ON/OFF ratio is about 24. https://scientiairanica.sharif.edu/article_4423_8d96fbcb57d1e2010dc1a19e8428f648.pdf