Metasurfaces Empowering 6G Communication and Sensing: Opportunities and Challenges

The insatiable demand for faster data rates, ultra-low latency, and ubiquitous connectivity will propel the exploration of metasurface (MTS) as a transformative force in the future 6G. This article explores the pivotal role of MTS in shaping the landscape of 6G communication and sensing. We begin by offering a primer on MTS, followed by an exploration of its diverse applications. We then critically discuss the challenges associated with MTS design, shedding light on issues such as limited versatility, frequency transfer ability, and constraints accommodating size and shape. Identifying these challenges as crucial barriers to unleashing the full potential of MTS, we propose a forward-looking solution. By harnessing the capabilities of large-scale models and implementing an AI agent, it can overcome the existing limitations faced by conventional MTS design approaches. This innovative approach holds the key to addressing the intricacies of MTS design and unlocking its full potential for enabling advanced functionalities in 6G networks. We conclude the article by outlining open questions and research gaps, providing a road-map for future investigations aimed at propelling the integration of MTS into the fabric of next-generation communication and sensing technologies.