Researchers at the Aerospace Information Research Institute of the Chinese Academy of Sciences have triumphantly developed a groundbreaking terahertz wave polarization modulator, enabling high-precision dynamic control of the polarization state of ultra-wideband terahertz waves. Terahertz waves, renowned for their exceptional penetration and low photon energy, find extensive applications in diverse fields such as security screening and non-destructive testing, and are poised as a pivotal direction in the evolution of 6G technology. This polarization modulator has made remarkable strides in versatility, operating over a vast bandwidth, and achieving high control accuracy. It offers advanced polarization resolution capabilities for spectral detection, catering to the needs of material physics research, biopharmaceutical quality assurance, and numerous other applications. Furthermore, it is anticipated to emerge as a cornerstone component of next-generation information technology, contributing to reduced transmission loss and enhanced data throughput in high-speed communications.