Full-space Hologram at W-band by Independent Phase Encoding of Metasurface

In recent years, people have utilized metasurfaces to control electromagnetic waves and achieve various novel functionalities. However, traditional metasurfaces only offered a single working mechanism. The emergence of full-space metasurfaces has introduced multiple degrees of freedom. Here, a dual-band metasurface operating at w-band to achieve independent manipulations of reflected and transmitted waves is proposed. To check the structure performance, the metasurface provided phase image hologram.