Scientists create a 'perfect' one-dimensional invisibility cloak

And when the team conducted their tests, the new design worked — they successfully beamed light around a cylinder 7.5 cm in diameter and 1 cm tall. They essentially rendered the object invisible to microwaves. "We built the cloak, and it worked," said Landy through a release. "It split light into two waves which traveled around an object in the center and re-emerged as the single wave with minimal loss due to reflections."

Now, it's important to note that Landy's invisibility cloak is unidirectional (the illusion only works when viewed from a specific angle), it would be difficult to achieve with visible light (the design principles that make the cloak work in microwaves would be difficult to implement at optical wavelengths), and it only works in two-dimensions.