This work presents a numerical analysis of a multilayer graphene-based absorber, composed of SiO₂, graphene, and metals (Ag, Au). The device structure is SiO₂/Graphene/SiO₂/metal, each material significantly influencing optical properties. The model, insensitive to the relaxation rate, exhibits high response time, beneficial for high-performance all-optical communication devices, resonators, and perfect absorbers. SiO₂ provides a stable, transparent dielectric base for wave propagation. Various Kubo formula references for graphene's conductivity were examined. Resonances were analyzed using different Ag and Au data sets from Rakic, Johnson, and Palik. The results demonstrate that the interaction of these components is crucial for realistic simulations aligned with experimental data.
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Santos et al. (2026) studied this question.
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