Scientists have found a way to capture terahertz radiation with a high frame rate. Previously, the exact way to do this did not exist, according to the work of scientists from the University of Durham, which was published in the journal Physical Review X.
Terahertz radiation is the radiation range between the infrared and radio spectrum, the wavelength of which is from 0.01 to 3 mm. This oscillation can apply both to microwaves of the radio spectrum and to the far infrared range.
Tracking terahertz radiation will allow you to observe the vibrations of electrons in solids and the vibrations of crystal lattices, and will also allow to shine through objects for the content of forbidden substances in them.
Now, scientists have for the first time found a way to track changes in terahertz radiation in slow motion or rapid shooting. To do this, they passed the signal through a cloud of excited cesium atoms.
When interacting with atoms, terahertz radiation is converted into a green stream in the visible range, which can be monitored at a frequency of a thousand frames per second.