▎ 摘　　要

The parallel interlaced graphene pair separated by two spatial silver strips is proposed and numerically investigated by using the finite-difference time-domain method. Thanks to the introduced silver strips, the unique plasmonic anti-symmetric coupling resonator is obtained and the outstanding mid-infrared band-pass filtering effect is achieved. The transmission spectrum is tuned dynamically not only by changing the coupling distance and but also via varying overlapping length of the double-layer graphene coupling system. In addition, without re-fabricating new structures, the transmission spectrum is also modulated over a wide wavelength range by a small change in the chemical potential of graphene utilizing external gate voltages. Simulation results are confirmed by theoretical calculations. The proposed resonator without doubt is unusual and our studies support the fabrication of active mid-infrared plasmonic nano-integrated circuits for optical processing.