▎ 摘　　要

This paper investigates tunable magneto-plasmons in graphene-based structures combined with gyro-electric layers. In the general waveguide, each graphene sheet has been sandwiched between two different gyro-electric layers. The whole structure has been exposed in the presence of a magnetic bias. An accurate analytical model based on all propagating modes has been proposed and led to closed-form complicated relations. As a special case of the multi-layer waveguide, a hybrid graphene-gyroelectric structure is studied in this paper. It has been illustrated that the propagating features of the exemplary waveguide can be tuned by changing the external magnetic bias and the chemical potential of graphene, which makes it a new tunable platform for the design of non-reciprocal plasmonic devices in the THz region.