Scientists at the University of Central Florida in the US have developed a new laser beam that does not use specific laws of light physics refraction.
This discovery may give rise to new communication techniques that would be useful, for example, to military and defense personnel communicating with each other.
The findings were published in Nature photonics On 22 June.
Spacetime wave packets
The term that teams of scientists call their new laser beam system is a “spacetime wave packet” that has the potential to change the way communication technology operates.
To explain existing communication methods, these are known as Snell’s rules. Simply put, scientists break Snell’s rule in their studies to explain how it works: If you look at a spoon in a glass of water, the spoon breaks to the point where it is water. resembles. This happens because light travels more slowly through water than through air, and light rays are bent upon entering the water.
The new laser beam, however, does not follow this law of physics, which is a basic law of light.
“This new class of laser beams has specific properties that are not shared by normal laser beams, ”explained Ayman Abordi, the study’s chief investigator.
“Spacetime wave packets can be arranged to behave in a normal way, not to change the speed at all, or even to accelerate in dense material. For example, these pulses of light are a Can reach different points in space at the same time. “
An example team uses to explain how their system works: if an aircraft is trying to send a message to two submarines at the same depth, but one plane is away from the other, the nearest submarine will receive the message more quickly. However, with its new laser beam, the message arrives in both submarines at the same time, as long as they are not at the same depth.
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The team emphasized that their laser beam fits in special relativity, and does not go completely against the laws of physics. His research does not alter oscillations with light waves, rather, it controls the speeds at which the peaks of light pulses travel. The team achieved this using a spatial light modulator.
The study’s co-author Basanta Bhaduri said, “Space-time refraction defies our expectations from the theory of the firm and provides new opportunities to shield the flow of light and other waves.”