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

The terahertz security equipment, developed in collaboration by the Fraunhofer Institute for Physical Testing Technology and Hubner, is set to launch in the European market. Meanwhile, a major domestic electronics group has also made significant progress by researching the first terahertz-based human security system. These developments suggest that terahertz technology is on the verge of a major industrial breakthrough, with promising applications in security screening and detection expected to capture a substantial market share. **Significantly Improved Security** As a cutting-edge scientific innovation of this century, terahertz technology occupies a unique position in the electromagnetic spectrum, situated between millimeter waves and infrared—often referred to as the "vacuum zone." With a frequency around 1 terahertz, it offers strong penetration capabilities and the ability to create three-dimensional images of objects that are otherwise invisible. While early applications have already emerged in areas such as mail inspection, explosive detection, and non-destructive testing, these are still in the initial stages of development. From a technical perspective, terahertz security systems offer enhanced safety and reliability. Unlike traditional methods, terahertz devices operate through passive detection, meaning they do not emit ionizing radiation or electromagnetic waves, making them completely safe for both people and objects being scanned. Moreover, because different materials emit distinct terahertz signatures, the technology can identify substances that are difficult or impossible to detect with conventional systems. Whether it's metal, explosive powders, or illegal food additives, all will be clearly visible under terahertz imaging. **Applications Beyond Security: Life Sciences and More** Beyond security, terahertz technology holds great potential in 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 high-speed requirements of big data communication. In practical terms, terahertz security systems have vast potential in anti-terrorism and national security. China has successfully broken the technological monopoly previously held by Western countries, with many domestic companies now mastering core technologies through years of research. This progress has laid a solid foundation for the widespread industrial application of terahertz technology in the near future.

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