Abstract:The existing passive metasurfaces have relatively limited functions. To increase the flexibility of controlling terahertz waves, a polarization-multiplexed reflective metasurface is proposed. This metasurface is capable of various functions such as beam deflection, dual-focus focusing, focused vortex, and far-field imaging. At a frequency of 1 THz, by separately incident x-polarized and y-polarized waves, the metasurface successfully generated two deflected beams and achieved dual-focus focusing on the focal plane. In addition, the metasurface also realized focused vortex beams with a topological charge of l=+2 and far-field imaging under the conditions of x-polarized and y-polarized wave incidence, respectively. The designed metasurface demonstrates the ability to flexibly manipulate terahertz waves under different polarization wave incidences, showing potential application prospects in the field of terahertz communication.