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Figure 10: Electrically tuned THz modulator based on flexible substrate. Panel . (a) Schematic representation of the graphene supercapacitor used as a broadband THz modulator. (b) Spectrum of the transmitted THz signal obtained after Fourier transformation of the recorded signal and normalization. Reproduced from [73]. Panel . (a) THz setup and MLG structure (inset) consisting of MLG sandwiched between host (PVC or PE), electrolyte, and gold electrode. (b) Corresponding frequency domain amplitudes. Reproduced from [74].