Terahertz bandwidth absorption metamaterial based on composite structure of single layer graphene

With the development of science and technology, people have realized the value of studying the terahertz band, in this paper, a terahertz bandwidth tunable metamaterial based on composite structure of single layer graphene is proposed, which can have an absorption higher than 0.9 at 3–6.7 THz and exhibit polarization insensitivity. By employing parameter inversion to calculate the relative impedance, the metamaterial adheres to the principles of impedance matching theory. The metamaterial exhibits considerable chemical and physical tuning capabilities, and it can be substantiated that the enhanced absorption rate of the metamaterial stems from a multitude of graphical configurations. Simultaneously, the metamaterial demonstrates a notable level of stability towards the incidence angle of electromagnetic waves and can function reliably at an incidence angle of 30°. In conclusion, the metamaterial holds promising potential for applications in radar stealth, communication, and other related domains. [Display omitted] •Through CST calculation, this model can achieve bandwidth absorption in the terahertz frequency band.•Designed through a single layer of graphene with strong adjustability•The electric field distribution and absorption principle were investigated by structure decomposition.•The model has a wide absorption rate and can achieve THz stealth.