Specially shaped laser pulses can be used to change the state of electrons in a molecule. This process only takes several attoseconds—but it can initiate another, much slower process: The splitting of the molecule into ...
General Physics
Dec 12, 2012
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With their ultra short X-ray flashes, free-electron lasers offer the opportunity to film atoms in motion in complicated molecules and in the course of chemical reactions. However, for monitoring this motion, the arrival time ...
General Physics
Dec 3, 2012
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Electrons move extremely rapidly inside atoms and molecules (the order of magnitude is the attosecond, i.e. 10-18 of a second). One way to observe these phenomena is to use isolated ultrashort pulses of light, which are successfully ...
Optics & Photonics
Nov 30, 2012
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With their ultra short X-ray flashes, free-electron lasers offer the opportunity to film chemical reactions or atoms in motion. However, for this super slow motion the arrival time and the temporal profile of the pulses must ...
Optics & Photonics
Nov 20, 2012
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(Phys.org)—Scientists from TU Berlin, DESY and the University of Paris discovered a surprising effect in the demagnetisation of ferromagnetic materials at DESY's free-electron laser FLASH. The team of researchers headed ...
General Physics
Oct 3, 2012
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A team of German researchers at KIT directed by Professor Christian Koos has succeeded in developing a novel optical connection between semiconductor chips. "Photonic wire bonding" reaches data transmission rates in the range ...
Optics & Photonics
Sep 20, 2012
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Back in the first half of the 20th century, when MIT's famed Harold "Doc" Edgerton was perfecting his system for capturing fast-moving events on film, the ability to observe changes unfolding at a scale of microseconds—millionths ...
General Physics
Sep 18, 2012
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Topological insulators are exotic materials, discovered just a few years ago, that hold great promise for new kinds of electronic devices. The unusual behavior of electrons within them has been very difficult to study, but ...
General Physics
Sep 18, 2012
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(Phys.org)—Using ultra-low input power densities, researchers at the University of Illinois at Urbana-Champaign have demonstrated for the first time how low-power "optical nanotweezers" can be used to trap, manipulate, ...
General Physics
Sep 17, 2012
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On the night of July 20, 2012, the laser system of the Berkeley Lab Laser Accelerator (BELLA), which is nearing completion at the Lawrence Berkeley National Laboratory, delivered a petawatt of power in a pulse just 40 femtoseconds ...
Optics & Photonics
Jul 27, 2012
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