A flexible terahertz metasurface and the effect of its bending characteristics on performance

The Stabilization issue of anomalous refraction and reflection in flexible metasurface based on the parylene-C film is investigated. Elliptical split-ring units with different arrangement can work as 2D beam deflector, 3D beam deflector or vortex generator. The simulation results illustrate that when the flexible metasurface undergoes small curvature deformation, it has almost no effect on the transmitted beam deflection and has a greater effect on the reflected beam. The vortex beam generator can still produce a stable vortex beam when the flexible metasurface undergoes a certain curvature deformation. This study contributes to the application of flexible metasurfaces in THz optical field modulation and THz communication. It also provides a new idea for applying THz metasurfaces in wearable devices.