Researchers have developed a highly sensitive method for detecting hotspots in the environment, such as bushfires or military threats, by harnessing the focusing power of meta-optical systems.

The key to the approach is innovative lens technology thinner than a human hair, which can collect and process infrared radiation from fires and other heat sources with much improved efficiency. Crucially, it does not need cryogenic cooling, unlike current sensors.

The result is sensor technology that promises to enhance devices in both the civilian and military spheres, said Dr. Tuomas Haggren, lead researcher on the project.