Scientists at the University of Cambridge broke the technological limit and one day they will convert invisible cloaks and invisible devices from science fiction to reality. By using long-chain threading particles, researchers have developed a technique to create microscopic "metamaterials" that can refract light in a special way for purposes that the human eye cannot see. While Harry Potter's invisibility cloak may still be a distance, the technology is currently available only for stationary objects.
The laboratory uses unfocused lasers to make billions of small needles, and the alloy nanoparticles are stitched together in a long line directly in water. These strings are stacked in layers similar to LEGO bricks. This new method can produce far more metamaterials than at present, making it possible to make invisible materials. By means of engineering on the nanoscale, "supermaterials" can be produced, which can control the way light refracts interact. The light-reflecting material is refracted in a "wrong" manner, creating a stealth effect that when light is irradiated to the surface absorbs or reflects, stealth and appearance are performed.
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