According to a BBC report Scientists have created a cloak which “rendered objects invisible under near-infrared light.”

Unlike previous such “cloaks”, the new work does not employ metals, which introduce losses of light and result in imperfect cloaking.
Because the approach can be scaled down further in size, researchers say this is a major step towards a cloak that would work for visible light.

Tiny holes all over the cloak bend the light around the bump

Xiang Zhang, Professor of Mechanical Engineering at the University of California, Berkeley lead one of the two teams working on this project:

“Essentially, we are transforming a straight line of light into a curved line around the cloak, so you don’t perceive any change in its pathway,” he explained.
This is not the first time an invisibility cloak has been made, but previous designs have used metals, whereas the carpet cloak is built using a dielectric – or insulating material – which absorbs far less light.
“Metals introduce a lot of loss, or reduce the light intensity,” said Professor Zhang. This loss can leave a darkened spot in the place of the cloaked object.

So, according to Professor Zhang, moving away from metals to use a material that absorbs very little light, is a “big step forward”.

The cloak, made of a series of microscopic holes strategically punched into a sheet of silicon, “changes the local density” of the object it is covering:

“In some areas we drill lots of very densely packed holes, and in others they are much sparser. Where the holes are more dense, there is more air than silicon, so the optical density of the object is reduced,” Professor Zhang explained.
“Each hole is much smaller than the wavelength of the light. So optical light doesn’t see a hole – it just sees a sort of air-silicon mixture. So as far as the light is concerned, we have adjusted the density of the object.”

Of course, LOLcats mastered invisible cloaks a few years ago but either no one told the science community or it’s a secret they prize more than cheeseburgers!