Invisibility cloaks no match for new detection technique.

Researchers from the Universitat Politècnica de València and DAS Photonics have developed a new technique to detect invisibility cloaks using diffraction tomography. The technique provides much more information about the layers, including a map of the object's refractive index, making the cloaks more easily detectable. The method could also be extended to detect acoustic invisibility cloaks and has potential applications in electronic warfare, signal intelligence, and biomedical imaging.