Dual-band polarization-independent maze-shaped absorber based on graphene for terahertz biomedical sensing

This paper introduces an adjustable metamaterial absorber in the terahertz spectrum with exclusive properties such as resistance to polarization variation. Although this absorber can operate in various applications like chemical and environmental industries, its captivating features in different refractive (RI) make it a good choice in sensing and biomedical applications such as cancer early detection, blood glucose monitoring, and detecting malaria mosquito bites. The structure originally includes four different layers from top to bottom: graphene/ SiO₂/Si/Au, respectively. The finite integration technique has been used for simulation. In terms of absorbing parameters, the proposed structure reveals an outstanding absorption of 98.32% at 4.3 THz and 98.49% at 7.35 THz, with an average Q-factor of 8.92, by following simple absorption rules, simulation, and electric field distribution of the suggested structure, which is illustrated through diagrams to consider various parameters such as frequency, sensitivity, and physical mechanism.