Fig. 1. Schematics of F-shape EIT metamaterial structure. (a) Three-dimensional schematic of the structure; (b) two-dimensional plane of the unit structure

Fig. 2. Variation of relative dielectric constant of InSb with temperature. (a) Variation of real part of relative dielectric constant with temperature; (b) variation of imaginary part of relative dielectric constant with temperature

Fig. 3. Transmission spectra of vertical InSb bar, two horizontal InSb bars, and the overall structure

Fig. 4. Electric field distribution of F-shape EIT metamaterial structure at different frequencies. (a) Electric filed distribution at frequency of f1; (b) electric filed distribution at frequency of f3; (c) electric filed distribution at frequency of f2

Fig. 5. Transmission spectrum when changing the distance G between two horizontal InSb bars

Fig. 6. Transmission spectrum when changing the distance g between vertical InSb bar and horizontal InSb bars

Fig. 7. Transmission spectra at different temperatures