Fig. 1. (a) Schematic of the unit cell of the proposed active EIT metasurface; (b) Schematic of the active control manner, CW: continuous wave, V_g: bias voltage

Fig. 2. (a) Simulated amplitude transmission spectra of the CWR (bright mode), DUR (dark mode) and the EIT structure, respectively; (b) Simulated surface current distributions of the EIT structure at the transparency window frequency, the black arrows illustrate the directions of the surface currents

Fig. 3. Measured amplitude transmission spectra of the EIT metasurface with and without the graphene layer

Fig. 4. Measured (a) terahertz transmission spectra and (b) transmission amplitudes at the EIT window frequency of the hybrid metasurface at different bias voltages under 0.25 W cm⁻² CW pump