This project presents a groundbreaking approach to developing a large-scale terahertz (THz) reconfigurable reflectarray (an antenna focusing beams like a parabolic dish antenna but with an array of unit cells on a flat surface) for advanced beam steering capability in next-generation wireless communication networks. The approach can potentially revolutionize how data is transmitted and received, enabling faster, more reliable, and adaptive wireless networks that can meet the fast-growing demands of a digitally connected society. By using innovative optical control methods, the project aims to eliminate traditional limitations in high-frequency communication systems, such as signal loss and integration complexity. The societal and national benefits are substantial: improved wireless infrastructure can support smart cities, enhance connectivity in rural and underserved areas, and drive economic growth through new technology platforms. Beyond communications, the research has broad impacts across multiple scientific and engineering fields by offering new tools for medical imaging, security screening, and chemical/biological sensing, enabling new discoveries and new applications. The project also contributes to education and outreach by integrating its research findings into university courses, involving students at all levels in research, and promoting STEM engagement in local schools, thereby fostering the next generation of innovators and engineers. The research of this proj