However the current systems, such as WLAN or Bluetooth have their limits: They transmit the data with clock rates of some gigahertz, maximum (a billion vibrations per second).
If one wants to increase the transmitted data quantity, then the clock rates must become still faster. Thus the range of the terahertz waves (1000 billion vibrations per second) has moved into focus - at least for short ranges, as for example, within rooms. However, thus far it has been extremely difficult here to produce and transmit enough transmitting power. That could change now.
Engineers and physicists of the Terahertz Communications Lab in Braunschweig, a cooperation of the Physikalisch-Technische Bundesanstalt (PTB) and the Technische Universität Braunschweig, have now - worldwide for the first time - successfully transmitted a video signal at a frequency of 300 GHz, over a distance of more than 22 meters, and have thus demonstrated that the transmission of user data is possible with terahertz waves.
Erika Schow | alfa
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DESY and MPSD scientists create high-order harmonics from solids with controlled polarization states, taking advantage of both crystal symmetry and attosecond electronic dynamics. The newly demonstrated technique might find intriguing applications in petahertz electronics and for spectroscopic studies of novel quantum materials.
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The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.
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Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.
"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...
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