Latest Vienna University of Technology Stories

Graphene Photodetector Combined With Computer Chip
2013-09-16 13:26:09

Vienna University of Technology The novel material graphene and its technological applications are studied at the Vienna University of Technology. Now scientists have succeeded in combining graphene light detectors with semiconductor chips. Today, most information is transmitted by light – for example in optical fibers. Computer chips, however, work electronically. Somewhere between the optical data highway and the electronic chips, photons have to be converted into electrons using...

Physics That Connect The Classical Temperature To The Quantum World
2013-09-09 12:00:32

Vienna University of Technology How does a classical temperature form in the quantum world? An experiment at the Vienna University of Technology has directly observed the emergence and the spreading of a temperature in a quantum system. Remarkably, the quantum properties are lost, even though the quantum system is completely isolated and not connected to the outside world. The experimental results are being published in this week’s issue of “Nature Physics”. Quantum and Classical...

Removing the “Random” Out Of A Random Laser
2013-07-15 14:43:30

Vienna University of Technology Random Lasers are tiny structures emitting light irregularly into different directions. Scientists at the Vienna University of Technology have now shown that these exotic light sources can be accurately controlled. The light they emit is as unique as a fingerprint: random lasers are tiny devices with a light emission pattern governed by random scattering of light. Understanding the underlying details of random lasing action has only been achieved...

Heat Radiation Of Small Objects Is Beyond Planck's Equations
2013-07-11 11:20:03

Vienna University of Technology Objects that are smaller than the wavelength of thermal radiation cannot radiate heat efficiently. A generalized theory of thermal radiation has now been experimentally confirmed at the level of a single object at the Vienna University of Technology. All the objects around us emit thermal radiation. Usually, this radiation can be described very accurately using Planck's law. If, however, the radiating object is smaller than the thermal wavelength, it...

Light Transistor Developed By TU Vienna
2013-07-08 10:08:30

Vienna University of Technology TU Vienna has managed to turn the oscillation direction of beams of light -- simply by applying an electrical current to a special material. This way, a transistor can be built that functions with light instead of electrical current. Light can oscillate in different directions, as we can see in the 3D cinema: Each lens of the glasses only allows light of a particular oscillation direction to pass through. However, changing the polarization direction of...

Molecular Switch for Low Cost Biofuel
2013-06-03 06:58:24

Vienna University of Technology The Vienna University of Technology, genetic engineers have found a trick, thanks to which fungi can be used for the production of biofuels far more cost effectively than before Lignocellulosic waste such as sawdust or straw can be used to produce biofuel — but only if the long cellulose and xylan chains can be successfully broken down into smaller sugar molecules. To do this, fungi are used which, by means of a specific chemical signal, can be made...

New Tool For Quantum Optics
2013-05-28 13:10:27

Vienna University of Technology A light wave oscillates perpendicular to its propagation direction — that is what students learn in school. However, scientists of the Vienna University of Technology (TU Vienna) now perform atom-physics experiments with light oscillating in the longitudinal direction. Storing light in a bottle is easier than one might think: Laser light can be coupled into an optical glass fiber in such a way that it does not travel along the fiber but rather...

Quantum-Memory In Atoms
2013-02-28 14:32:19

Vienna University of Technology Order tends towards disorder. This is also true for quantum states. Measurements at the Vienna University of Technology show that in quantum mechanics this transition can be quite different from what we experience in our daily lives. Ice cubes in a cocktail glass melt until an equilibrium state is reached in which the ice cubes are gone. After that, the geometric shape of the ice cubes is completely lost. The liquid does not contain any memory of their...

Electron Beams That Possess An Inner Rotation Created
2012-11-05 13:28:11

Vienna University of Technology Vortex beams, rotating like a tornado, offer completely new possibilities for electron microscopy. A method of producing extremely intense vortex beams has been discovered at the Vienna University of Technology (TU Vienna). Nowadays, electron microscopes are an essential tool, especially in the field of materials science. At TU Vienna, electron beams are being created that possess an inner rotation, similarly to a tornado. These "vortex beams" cannot only...

The Quantum World Can Be A Surprising Place
2012-09-07 09:14:58

April Flowers for redOrbit.com - Your Universe Online Thermalization is the process of particles reaching thermal equilibrium through mutual interaction. We see this process around us every day. Take for example, ice cubes dropped into a pot of hot water. The cubes melt and cannot remain stable. Well-ordered ice crystals turn into a disordered liquid as the molecules of the ice and the molecules of the water reach thermal equilibrium, ending up at the same temperature. Research at the...

Word of the Day
  • A stinking tobacco.
  • Offal; waste animal product; organic matter unfit for consumption.
This word comes from the Spanish 'mondongo,' tripe, entrails.