This is one of good news for those who believe in Science Fiction. Scientist are nearly to create a material that can reflect / bend light from object and object will hide and can’t seen. This is called “INVISIBLE CLOAK”
What is INVISIBLE CLOAK
Led by Xiang Zhang, director of materials science at Lawrence Berkeley National Laboratory, has created a thin film consisting of a 50-nanometer-thick layer of magnesium fluoride topped by a varying pattern of tiny, brick-shaped gold antennas, each 30 nanometers thick. The “bricks” were built in six different sizes, ranging from about 30 to 220 nanometers long and 90 to 175 nanometers wide.
But the Team of scientist is doing almost everything to hide the irregular object. In the previous time, some Scientist were able to create material that can hid regular shape object but not irregular shape object
How INVISIBLE CLOAK Works
Led by Xiang Zhang, director of materials science at Lawrence Berkeley National Laboratory, the group constructed a thin film consisting of a 50-nanometer-thick layer of magnesium fluoride topped by a varying pattern of tiny, brick-shaped gold antennas, each 30 nanometers thick. (For comparison, an average strand of human hair is about 100,000 nanometers wide.) The “bricks” were built in six different sizes, ranging from about 30 to 220 nanometers long and 90 to 175 nanometers wide.
Invisible cloak are design in such a way that it can bend light around an object. But materials that do this are typically hard to shape and only work from narrow angles. But a new cloak avoids that problem, and is thin and flexible enough to be wrapped around an object of any shape, the researchers said. It can also be “tuned” to match whatever background is behind it — or can even create illusions of what’s there, they added.
Xiang Zhang Team covered a tiny, irregular shaped object measuring about 36 microns across (or a bit more than one-thousandth of an inch).
The researchers said that
“shining a light, with a wavelength of 730 nanometers, or near-infrared, they found that it reflected back almost perfectly. The light scattering from the cloak still bounced off the object, but without revealing where the object was — as though there were just a flat mirror in its place”. Scientists explained “the tiny object gone invisible because the gold antennas controlled the scattering of the light that reflects off of it”
Light reflecting off an object – even a glass mirror, will scatter at least a little, especially if the shape is irregular. The waves of light will also sometimes create interference patterns.
the cloaking technology’s reflectivity offers another application: displays. Right now, any big projection (e.g., a movie in a theater) has to use a relatively flat surface. But if the phase and frequency of the light reflected from it could be finely controlled, that problem could go away. A projection surface could be any shape, and the resulting picture would not be distorted. This kind of material has been fabricated before, and that a next step would be to make a lot of it at industrial scales, tuning the antennas to different wavelengths of light.
The new invisible cloak changes that: The gold bricks reflect the light in such a way that the light’s phase and frequency are both preserved. (Phase is an angle measurement that tells you how far along a light wave you are; two waves 180 degrees out of phase cancel out.)
The ultrathin cloak creates an effect that makes it seem like the light were hitting a perfect mirror and the cloak and object weren’t even there. Even the edges are invisible with the new device, the researchers said.