A dual functional tunable terahertz metamaterial absorber based on vanadium dioxide.

A dual-functional switchable metamaterial absorber (MMA) based on vanadium dioxide (VO), which achieves flexible switching between broadband absorption and four-band absorption by adjusting the VO conductivity, was proposed. The device has a broadband absorption function when VO is in the metal phase, and the conductivity is 3 × 10 S m. Numerical simulation shows that the absorption rate of the device reaches over 90% in the frequency range of 3.