In this paper, we demonstrate a kind of broadband metamaterial perfect absorber using both graphene and metal resonator elements. Through step by step design and simulation, wider absorption band from about 4.22 THz to 7.48 THz with average absorption rate up to 98.21% is achieved in the absorption spectrum. In addition, the absorber has characteristics of polarization insensitivity and wide incident angle due to its inherent rotational symmetry. Moreover, the absorption band can be adjusted by changing the chemical potential of the graphene. The superiorities of broadband, high absorption rate, polarization independent and wide-angle characteristics make it have potential application prospects in electromagnetic wave absorbing, signal sensing and detection, and other optoelectronic devices.

在本文中，我们展示了一种使用石墨烯和金属谐振器元件的宽带超材料完美吸收器。通过逐步设计和模拟，在吸收光谱中实现了从约4.22 THz到7.48 THz的更宽吸收带，平均吸收率高达98.21%。此外，由于其固有的旋转对称性，吸收体具有偏振不敏感和宽入射角的特性。此外，可以通过改变石墨烯的化学势来调整吸收带。宽带、高吸收率、偏振无关和广角特性的优越性使其在电磁波吸收、信号传感与检测等光电器件方面具有潜在的应用前景。