When the screens are inserted into the beam, the desired patterns emerge: a cross or the logo of TU Wien.
Credit: TU Wien
Researchers succeed in shaping terahertz beams with extremely high precision. Terahertz radiation can be used for a wide variety of applications and is used today for airport security checks just as much as it is for material analysis in the lab. The wavelength of this radiation is in the millimetre range, meaning that it is significantly larger than the wavelength of visible light. It also requires specialised techniques to manipulate the beams and get them into the right shape...
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