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A disadvantage of the use of noble metals in photonic circuits is that the SPPs propagation length is small, because of the absorptive nature of the metals regarding the light, in the frequency range used in telecommunications (from infrared until the visible light). A new material, called graphene, has electrical/optical properties more suitable for photonics than the noble metals. Thereafter, graphene is attracting the attention of researchers who work in the fields of nanotechnology and nanophotonics, due to its exceptional optical and electrical properties, as, for example, mobility, high...