Design of reflective coding metasurface for terahertz wave beam steering for 6G technology

Optical beam steering is needed in many applications such as LIDAR, 6G communications, laser machining, and 3D printing. In this paper, we report the design of a reflective coding metasurface for 0.3 THz beam steering. The unit cell is designed to operate as a 3-bit coding metasurface to achieve better control of EM waves. The proposed 3-bit coding metasurfaces can reflect the incident EM wave with a high reflection angle up to 77.5 degrees, which is in good agreement with the theoretical prediction. The obtained results show that the proposed coding metasurface is a suitable candidate for THz wave beam steering for 6G technology.