Detecting light and radiation is essential across the electromagnetic spectrum, but some regions remain difficult to work with. One of the biggest challenges involves terahertz (THz) radiation, which sits between microwaves and infrared light. Existing detectors for these frequencies are often slow, lack sensitivity, or depend on large, costly systems that may require extreme cooling, limiting their practical use.
Researchers have now developed a compact new detector that combines quantum physics with a specially engineered metasurface, significantly improving the ability to capture and measure terahertz radiation. The work, reported in Advanced Photonics, could help advance technologies ranging from wireless communications to medical imaging and astronomy.
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