A bilayer metamaterial composed of double graphene strips and square-ring graphene is proposed to realize plasmon induced transparency (PIT). The couple mode theory (CMT) is employed to explain the phenomenon of PIT, whose results are in good agreement with the simulation of the finite-difference time-domain. The dynamically adjustable PIT is investigated, where an on-to-off modulation composed of synchronous and asynchronous switching is realized by modulating the Fermi levels of graphene, the modulation degrees of amplitude are 67.5%, 86.1%, and 65.3%, respectively. The changes of transmission spectra are also studied by adjusting the coupling distance between double graphene strips and square-ring graphene, and the result shows that PIT is gradually disappeared with the increase of coupling distance and the decrease of coupling strength. Then, the corresponding relationships between dips of PIT and modes of CMT are described clearly, which are affected by the relative location between resonant points of the bright and dark modes.

提出了由双石墨烯带和方环石墨烯组成的双层超材料，以实现等离激元诱导的透明性（PIT）。耦合模式理论（CMT）用于解释PIT现象，其结果与有限差分时域的仿真非常吻合。研究了动态可调的PIT，其中通过调制石墨烯的费米能级来实现由同步和异步切换组成的开-关调制，幅度调制度分别为67.5％，86.1％和65.3％。通过调节双石墨烯条与方环石墨烯之间的偶联距离，研究了透射光谱的变化，结果表明，随着偶联距离的增加和偶联强度的降低，PIT逐渐消失。然后，