“…In recent years, a number of multi-functional metasurfaces (MFM) based on these three types have been proposed in both terahertz (THz) and microwave bands, which have different functions for different incident waves. [21][22][23][24][25][26][27] For example, by controlling the phase of Ge 2 Sb 2 Te 5 (GST) in the near-infrared (NIR) region, Zhang et al 28 proposed a multifunctional absorber capable of controlling the polarization and hence the selective absorption, and Nikhil et al 29 incorporated vanadium dioxide (VO 2 ) into the metasurface, which was able to achieve a dual-band transmission response in the THz band range. However, these devices are based on the control of established operating modes (absorption, transmission, or reflection), such as phase, frequency, amplitude, etc., and do not realize the switching of operating modes, which greatly limits the further applications of the metasurfaces.…”