Six-Band Frequency Full Absorber Based on The Heterogeneous Structure of Graphene Metamaterial

This paper presents and investigates a complete six-band metamaterial absorber. On the heterogeneous structure of graphene with copper and SiO2 substrates. The top layer of the structure has a graphene disc in the center and is surrounded by fan blades and circular strips on the outer surface. The designed adsorbent is a resonant adsorbent with six peaks of complete absorption, which are as follows: 98%, 99.3%, 99.1 %, 92%, 99.6%, and 99% respectively at 7.9 THz, 9.13 THz, 10.2 THz, 10.9 THz, 11.3 THz and It is 12.4 THz. The absorption mechanism has been investigated based on electric fields. This structure can the adsorption peak can be adjusted and increased by altering the chemical potential of graphene or its relaxation time, without inducing changes in its structure. Furthermore, due to its simple design and high adsorption peak value, this adsorbent is highly suitable for applications in sensor science, imaging, and filtering of communication signals.