Using an ultrafast transmission electron microscope, researchers from Israel
Experiments were carried out in the laboratoryelectron beam quantum dynamics. Single-layer materials, also known as two-dimensional materials, are new in themselves, consisting of a single layer of atoms. Now, scientists at the Technion have shown for the first time how pulses of light travel within these materials. Their results appeared in the journal Science.
Light travels through space at a speed of 300thousand km / s Passing through water or glass, it slows down for a fraction of a second. But when passing through some solid bodies with several layers, light slows down almost a thousand times. This is because light causes the atoms of these special materials to vibrate, creating sound waves (also known as phonons), and these atomic sound waves vibrate to create light.
Scientists were shining in pulses along the edge of the two-dimensionalmaterial, creating hybrid sound and light waves in it. Not only were they able to record these waves, but they found that the impulses can spontaneously accelerate and decelerate. These waves even split into two separate impulses moving at different speeds.
“Unlike other methods, our new techniqueallows you to get an image of the movement of light without disturbing it. Our results could not be achieved with existing methods. Thus, in addition to our scientific findings, we present a previously unseen measurement technique that will have implications for many other scientific discoveries, ”the researchers added.
For the first time in 50 years, Russians will see an annular eclipse: where and how to watch it
Scientists have presented a microscope that allows you to see the smallest cellular structures
The animal came to life after 24 thousand years of hibernation in the Siberian permafrost