Researchers develop 3D thermal invisibility cloak

Engineers from the University of Illinois Urbana-Champaign and the Technical University of Denmark have developed a three-dimensional thermal invisibility cloak capable of hiding objects from infrared cameras. Published in the journal Nature Communications, the technology works by redirecting heat around an object rather than simply blocking it, allowing infrared sensors to detect a temperature pattern consistent with an empty environment.

Unlike previous technologies that were limited to flat surfaces or specific directions of heat flow, this new device uses a lattice structure that can adjust heat conduction independently in three dimensions. The prototype was constructed using 3D-printed aluminum to facilitate heat conduction, combined with a rubber-like material with low thermal conductivity to fill the remaining spaces. This allows the device to protect the hidden region from extreme temperatures, both hot and cold.

Lead researcher Shelly Zhang noted that the device can hide complex 3D objects from an infinite number of directions. Potential applications include protecting sensitive electronic components, managing microchip heat, and shielding thermal detection equipment.