Eye-Tracking-Driven Programming Metasurface System for Adaptive Beam Focusing and Polarization-Agile Communication

Expanding near-field regions in high-frequency 6G systems necessitates precise spatial-field control, yet narrow beamwidths and 3-dimensional tracking complexities create severe alignment hurdles. Here, we present an eye-tracking-driven programmable metasurface that bridges human visual intent with real-time electromagnetic responses via gaze-contingent beam steering. The system integrates a polarization-agile metasurface featuring independent 1-bit phase control for both copolarized and cross-polarized reflections. By engineering a 90° phase offset between these channels, the eye-tracking-driven programmable metasurface enables high-gain beam focusing and efficient linear-to-circular polarization conversion. Experimental results confirm that the system dynamically maps 3-dimensional gaze coordinates to metasurface coding patterns with millisecond-level responsiveness, facilitating robust near-field focusing and far-field scanning. This work establishes a "service-follows-vision" communication scenarios for intelligent wireless systems, offering distinct advantages in signal enhancement and interference mitigation.