▎ 摘　　要

We put forward an uncomplicated and novel graphene structure, which produces single and dual dynamic tunable plasmon induced transparency (PIT) in terahertz frequency through the coupling of bright-bright modes and bright-dark modes. The structure is studied theoretically by using the coupled mode theory (CMT), which is consistent with the finite difference time domain (FDTD) simulation one. The Fermi level of graphene is investigated to dynamically control the transmission of the PIT peak at the center frequency, and the modulation depth of this switch effect is up to 89%. Besides, the bandwidth and frequency of the PIT can also be altered through the Fermi level. Furthermore, multiple switching effects are achieved with the modulation depths of 57%, 67%, and 61%, respectively. We believe that this structure has a good application prospect in the communication and sensing areas.