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Figure 14: Magnetically tuned THz modulator. Panel . (a) The structure model of THz wave modulator based on magnetized plasma PC. (b) The real part (solid) and image part (dotted) of neffof InSb in the THz regime with the dependence of the external magnetic field. Reproduced from [81]. Panel . (a) Schematic of the modulator structure. (b) Refractive index of the ferrofluid at different magnetic field intensities. Reproduced from [82].