All-In-One Integrated Multifunctional Broadband Metasurface for Analogue Signal Processing, Polarization Conversion, Beam Manipulation, and Near-Field Sensing

作者：Liu, Baiyang; Du, Jiachen; Jiang, Xiaonan; Li, Yin; Wong, Sai-Wai; Cheng, Qiang^*; Cui, Tie Jun^*; Zhang, Qingfeng^*

来源：Advanced Optical Materials, 2022, 10(20): 2201217.

DOI：10.1002/adom.202201217

• beamforming
• metasurface imager
• polarization conversion
• programmable metasurface
• spatial phaser
• steering-logic board

Programmable metasurface, or reconfigurable intelligent surface is one of the most promising strategies to enhance communication and sensing capacities via arrays of reconfigurable meta-atoms. The functionalities of conventional programmable metasurfaces are usually limited, and active meta-atoms are connected with steering-logic board through cables, which makes the whole system inconvenient for installation and stable use. Here an all-in-one integrated multifunctional metasurface for various application purpose is proposed. The integration of metasurface and steering-logic board produces an all-in-one system, which makes it compact, low profile, and stable. The novel meta-atom structure provides all-in-one functionalities, including 1) dispersion-reconfigurable spatial phaser for analogue signal processing, 2) polarization conversion, 3) beam steering and orbital angular momentum generation for high-speed communication and, 4) near-field scanning for sensing. The proposed metasurface also has a broadband property, which is operating from 9.5 to 10.5 GHz with 10% relative bandwidth. Such a design integrates functionalities of signal processing, communication, and sensing in a single programmable metasurface, which makes it especially useful for integrated sensing and communication toward next-generation wireless networks.