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Berkeley Lab Researchers Create a Nonlinear Light-generating Zero-Index MetaMaterial

By Guest PostJanuary 3, 2014Scienceberkeley lab, chemical composition, efficient light generation, first plasmonic nanolasers, four wave mixing, future quantum networks, haim suchowski, information age, kevin obrien, light generating, multidirectional emission, nonlinear, nonlinear optics, photon direction, quantum processors, silicon nitride membrane, supercomputers, technique, vacuum, xiang zhang, zero index metamaterial, zero refractive index

Holds Promise for Future Quantum Networks and Light Sources

The Information Age will get a major upgrade with the arrival of quantum processors many times faster and more powerful than today’s supercomputers. For the benefits of this new Information Age 2.0 to be fully realized, however, quantum computers will need fast and efficient multi-directional light sources. While quantum technologies remain grist for science fiction, a team of researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have taken an important step towards efficient light generation, the foundation for future quantum networks. (more…)

Measuring Table-Top Accelerators’ State-of-the-Art Beams

By Guest PostNovember 4, 2012Scienceaccelerator, berkeley lab, boundary, chen lin, coherent, cotr, density modulation, electron, electron beam, electron laser, fusion research, high density, high energy, hydrogen gas, initial momentum, jeroen van tilborg, laser plasma acceleration, light regime, light source, loasis, longitudinal slice, lpa, modulation, momentum, mylar foil, optical, particle count, photon pattern, plasma, pulse, radiation, transition, ultrathin, vacuum, wim leemans, xray window

Studies by Berkeley Lab scientists of electron beam quality in laser plasma accelerators include novel tests for slice-energy spread

Part Two: Slicing through the electron beam

Wim Leemans of Berkeley Lab’s Accelerator and Fusion Research Division heads LOASIS, the Laser and Optical Accelerator Systems Integrated Studies, an oasis indeed for students pursuing graduate studies in laser plasma acceleration (LPA). Among the most promising applications of future table-top accelerators are new kinds of light sources, in which their electron beams power free electron lasers.

“If our LPA electron bunches had good enough quality for free electron lasers – and were really only femtoseconds long – we should see a particular kind of radiation called coherent optical transition radiation, or COTR,” Leemans says. “So I assigned my doctoral student Chen Lin, a graduate of Peking University and now a postdoc there, to find it.” (more…)

Fast Times in Physics

By Guest PostNovember 29, 2011Scienceatomic clocks, beams of neutrinos, c, Chicago, einstein, equation, Europe, faster than light, fermilab, Japan, marvin marshak, minos, neutrinos, northern minnesota, opera, physicists, scientific world, soudan underground laboratory, speed of light, subatomic particles, time, university of minnesota, vacuum, vibrations of cesium atoms

A U physicist will help determine if neutrinos can outrace light

Back in 2007, a physics experiment clocked elusive subatomic particles called neutrinos going faster than light.

That wasn’t supposed to happen. If the speed of light in a vacuum—denoted “c” by physicists—isn’t the universal speed limit, it would mean that Einstein put the wrong number in his famous E=mc² equation.

University of Minnesota physicist Marvin Marshak was part of the experiment, called MINOS. It clocked beams of neutrinos shot from Fermilab, a national physics lab near Chicago, to a detector 457 miles away in the Soudan Underground Laboratory in northern Minnesota. (more…)

Theoretical Breakthrough: Generating Matter and Antimatter from the Vacuum

By Guest PostDecember 9, 2010Scienceannihilation, anti electron, antimatter components, electron, engineers, fundamental matter, gamma photon, gerard mourou, high energy electron beam, high energy particle of light, igor sokolov, laser pulse, neutron stars, particle accelerator, particles, paul dirac, physicist, positrons, pulsars, qed strong pulsed laser fields, ultra high intensity laser beam, university of michigan, vacuum

ANN ARBOR, Mich.— Under just the right conditions — which involve an ultra-high-intensity laser beam and a two-mile-long particle accelerator — it could be possible to create something out of nothing, according to University of Michigan researchers.

The scientists and engineers have developed new equations that show how a high-energy electron beam combined with an intense laser pulse could rip apart a vacuum into its fundamental matter and antimatter components, and set off a cascade of events that generates additional pairs of particles and antiparticles. (more…)

Tag Archives: vacuum

Berkeley Lab Researchers Create a Nonlinear Light-generating Zero-Index MetaMaterial

Measuring Table-Top Accelerators’ State-of-the-Art Beams

Fast Times in Physics

Theoretical Breakthrough: Generating Matter and Antimatter from the Vacuum