Design of novel sensitive terahertz metamaterial absorbers based on graphene-plasmonic nanostructures

In this paper, four different configurations of sensitive metamaterial absorbers based on graphene-plasmonic combinations are designed and proposed. The nanostructures made graphene, SiO2, aluminum gold layers a silicon substrate. Graphene-ring shaped structures with diagonal strips in vertical horizontal directions considered the which greatly affect absorption characteristics (absorption peak value wavelength). Aluminum layer is used structure to prevent transmission light throughout some improve factor. To promote functionality structures, effects structural parameters (R1 R2) chemical potentials (Ef1, Ef2, Ef3 Ef4) also studied. individual strip demonstrate distinct wavelength ranges; structure-1: 45–60 µm, structure-2: 50–70 structure-3: 70–85 structure-4: 80–100 µm. Thus, they can be utilized for wide categories applications. Sensitivities 1500 nm/RIU, 2250/RIU, 3750 nm/RIU 4850 obtained types, respectively. proposed categorized as refractive index biosensors, indicate acceptable sensitivities detection elements like hemoglobin glucose blood samples.