Fig. 7
a Three-dimension structure sketch of tunable metamaterial absorber (case 2) by introducing VO2 continuous layer with the thickness of 0.4 μm under the layer of analogy I-typed resonator; b absorption curves of tunable terahertz metamaterial absorber (case 2) under conductivity values of σ = 200 S/m and σ = 200,000 S/m; c absorption curves of tunable metamaterial absorber (case 2) under conductivity values