Northwestern University researchers have created a new cloaking material that can render objects invisible in the terahertz range. Though this design cannot translate into an invisibility cloak for the visible spectrum, it could have implications in diagnostics, security, and communication.
The cloak, designed by Cheng Sun, assistant professor of mechanical engineering at Northwestern's McCormick School of Engineering and Applied Science, uses microfabricated gradient-index materials to manipulate the reflection and refraction of light. Sun's research was published in Scientific Reports this month.