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Researchers from the Vienna University of Technology have created a plastic panel with the 3D printer to show how it can be used to manipulate tetrahedral rays. An important part of the manipulation: the phase shift.
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Today, terahertz radiation is used in many places, whether at the airport security check or at the airport's badysis. material in the laboratory. The wavelength is in the millimeter range, which means that it is larger than in visible light. To manipulate the beam, you need special methods. At the Vienna University of Technology, it was possible to arbitrarily shape the beams using a plastic shutter accurately calculated by the 3D printer
"Radiation terahertz is transparent for simple plastics, such as glbad for visible light. Andrei Pimenov of the Institute of Solid State Physics of the Vienna University of Technology. "If the terahertz waves move through the plastic, they are slowed down, so the individual wavebands are slightly shifted – we are talking about phase shift."
With phase shift, the beam can be formed. At the thickest parts of the lens, the light beam spends more time than a parallel beam at another location. The shape of the beam changes. A large beam of light can be focused on a single point. The team at the Vienna University of Technology announces in a press release that it has even bigger goals.
3D printed plastic panel
If you bring a custom plastic panel a few centimeters in diameter and a thickness between 0 and 4 millimeters in the beam, the project succeeds, L & # 39, thickness must be adjusted exactly, with different areas. This is only while the beam at the end can give the desired image. The necessary model can be calculated with a special method.
"The procedure is surprisingly simple," says Andrei Pimenov. "You do not even need a 3D printer with a very high resolution." It's enough that the accuracy of the structure is significantly better than the wavelength of the radiation used – this is not the case. is not a problem terahertz radiation with a wavelength of 2mm. "
The team of Andrei Pimenov has produced different screens. So, they could show the possibilities of the method. With a lens, they formed a broad beam in the form of the logo of the Vienna University of Technology. They want to show the infinite geometric limits. The method is easily applicable according to Pimenov and can be used in many fields. If you are interested in scientific research in the field of 3D printing, such as 3D printing of gold nanostructures of the Vienna University of Technology, which we talked to you about in november 2016, subscribe to our newsletter here. We always keep you informed.
