"Scientists Develop Time-Reversing 'Mirror' for Electromagnetic Waves"

Scientists at the City University of New York have created a "mirror" that can reflect an electromagnetic wave backward in time, paving the way for ultra-fast communication and computing applications using light. The mirror temporally reverses waves, reflecting them stretched out and reversed. The team's next endeavor will be to experiment in the hundreds of GHz, but they will still be far from the 400THz frequencies of visible light.