Scientists have managed to produce light crowd inside a chip.The twisted light – light or braided – is a kind of light does not travel in a straight line, but in a spiral, shaped like a screw.Its technical name is light MAO stands for orbital angular momentum – see details in the report:
This type of light has been generated using lenses and half-wave plates, being an extremely efficient mechanism to encode and transmit information.Recently, researchers have demonstrated that a beam of light crowd can carry 2.5 terabits of data per second .
Chip that emits light crowd
Now Xinlun Cai and a team of British and Chinese researchers managed to condense all the technology to manipulate the orbital angular momentum of light inside a chip.The device is more than 1000 times lower than lowest light emitting MAO already created.The discovery will accelerate very practical feasibility of the technology, which has proved extremely effective in laboratory conditions.
According to the researchers, the light will give fans an unprecedented boost in communication technology and optoelectronics , which explores the possibility of exchanging data into chips using light instead of electricity.
The secret to twist the light inside a chip is tiny rings with internal grooves spaced carefully.The micron capture light and make turning inside before escaping.In quantum mechanics, this manipulation is associated with the orbital angular momentum of photons. Instead of moving in a straight line, the photons in light crowd “orbit” around the imaginary axis of the light beam.
The light exits the rings do not exactly like a bolt, but as a vortex, more reminiscent the form of a cyclone.When the twisted light interacts with matter, it exerts a rotational force, imposing a torque on the subject that can be exploited to manipulate tiny particles – are called optical tweezers.
Classical and quantum information
And is it possible to give more than a small “torcidinha” in the light.One can also twist it to different degrees, which can be used to encode information.This allows a much larger amount of data to be transmitted in a single beam, greatly increasing the capacity of optical fiber links.
Indeed, individual photons can use these differing degrees torsional quantum bits to represent, as an individual particle of light can be rotating clockwise and counter-clockwise simultaneously.Thus, the light fans could serve to transfer information within a quantum processor.