Terahertz imaging technology is expected to welcome industrial opportunities in security applications

The terahertz security equipment, developed in collaboration between the Fraunhofer Institute for Physical Testing Technology and Hubner, is set to enter the European market. Meanwhile, a leading domestic electronics group has also made significant progress by researching the first terahertz-based human security system. These developments signal that terahertz technology is on the verge of major industrial breakthroughs, with promising applications in security screening and detection that could capture a substantial share of the market. **Significantly Improved Security** As a cutting-edge scientific technology of this century, terahertz waves occupy the "vacuum zone" between millimeter waves and infrared on the electromagnetic spectrum. With frequencies around 1 trillion Hz, terahertz radiation offers strong penetration capabilities and unique imaging properties that allow for three-dimensional visualization of objects that are otherwise invisible. Although it has already been used in early applications such as mail inspection, explosive detection, and non-destructive testing, these are just the beginning. From a technical standpoint, terahertz security systems offer improved safety and reliability. Unlike traditional methods, terahertz devices operate through passive detection, meaning they do not emit ionizing or harmful electromagnetic radiation. This makes them safe for both people and objects being scanned. Additionally, because different materials emit distinct terahertz signatures, the technology can detect substances that are difficult or impossible to identify with conventional security systems—whether it's metal, explosive powders, or illegal food additives. Everything becomes clearly visible under terahertz imaging. **Applications Beyond Security** Beyond security, terahertz technology holds great potential across various fields, including life sciences, materials science, astronomy, environmental monitoring, and wireless communication. In particular, terahertz wireless communication could address current limitations in data transmission speed, enabling the transfer of large volumes of information efficiently. It is currently the only known method capable of meeting the demands of high-speed wireless data transmission required for big data applications. In practical terms, terahertz-based security systems have significant industrial prospects, especially in anti-terrorism and national security. China has successfully overcome the technological monopoly previously held by Western countries, with many domestic companies now mastering key terahertz technologies through years of research. This progress lays a solid foundation for the future industrialization and widespread adoption of terahertz technology.

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