Based on a graphene asymmetric sdouble ellipse (ADE) structure, the tunable Fano resonance characteristics in the terahertz range have been symmetrically studied, including the effects of graphene Fermi levels, asymmetrical degrees, operation frequencies and structural parameters. The results show that due to the strong coupling between the incident THz waves and graphene ADE structures, a strong Fano peak can be observed by arranging double ellipse asymmetrically. The maximum peak of Fano resonance reaches 0.918, and its Q-factor is about 20. As the asymmetrical degree of the ADE structure increases, the Fano peak value increases, and the amplitude modulation depth reaches about 75%. As graphene level increases, the amplitude and frequency modulation depths reaches more than 31% and 11%, respectively. These results are very helpful to design novel tunable graphene devices with high Q-factor devices in the future, such as sensors, modulators, and filters.

基于石墨烯不对称双椭圆（ADE）结构，对称研究了太赫兹范围内的可调Fano共振特性，包括石墨烯费米能级，不对称度，工作频率和结构参数的影响。结果表明，由于入射太赫兹波与石墨烯ADE结构之间的强耦合，通过不对称排列双椭圆可以观察到强Fano峰。Fano共振的最大峰值达到0.918，其Q系数大约为20。随着ADE结构的不对称度增加，Fano峰值增加，并且幅度调制深度达到大约75％。随着石墨烯含量的增加，振幅和频率调制深度分别达到31％和11％以上。这些结果对于设计未来具有高Q因子器件的新型可调谐石墨烯器件非常有帮助，例如传感器，调制器和滤波器。