A Terahertz Multi-Band Metamaterial Modulator Based on the Phase Transition Principle of Vanadium Dioxide

In this paper, based on the phase transition principle of vanadium dioxide (VO
2
), a temperature-controlled terahertz (THz) metamaterial modulator with multi-band responses is proposed. The THz transmission performances of the proposed device are studied and analyzed. By controlling the temperature of VO
2
, the amplitudes of THz waves can be dynamically manipulated in three frequency bands, with a maximum absolute modulation depth of 0.85. The design is flexible in terms of effective modulation when the incident THz wave angles vary from 0° to 30°. The proposed device can provide a new modulation method in future THz communication applications.