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Dynamic Spectroscopy Duo

By Guest PostOctober 5, 2014Scienceausbreitung von tumoren, berkeley lab, biological systems, brendan barrett, dcm, graham fleming, hendrik kramers, jumping nanoparticles, kramers turnover, laser trapped particle, levitated nanoparticles, loic rondin, lomas barbudal, monkey project, role of friction, sociable capuchins, Thomas Oliver, two dimensional

2D Electronic-Vibrational Spectroscopy Technique Provides Unprecedented Look into Photochemical Reactions

From allowing our eyes to see, to enabling green plants to harvest energy from the sun, photochemical reactions – reactions triggered by light – are both ubiquitous and critical to nature. Photochemical reactions also play essential roles in high technology, from the creation of new nanomaterials to the development of more efficient solar energy systems. Using photochemical reactions to our best advantage requires a deep understanding of the interplay between the electrons and atomic nuclei within a molecular system after that system has been excited by light. A major advance towards acquiring this knowledge has been reported by a team of researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley. (more…)

Diamond Imperfections Pave the Way to Technology Gold

By Guest PostNovember 23, 2013Scienceadvanced technology, berkeley lab, combination of theory, creation of qubits, data, dephasing, detection, diamond defects, Diamond Imperfections, diamond impurities, dmitry budker, electronic dynamic, electronic spectroscopy, electronic state phenomena, graham fleming, magnetic field, magnetometry, nanophotonics, nanoscale, nitrogen vacancy, non radiative relaxation, NV center, quantum information, quantum information processing, quantum mechanical effects, quantum spin, relaxation, spectroscopic signals, spin addressing, Technology Gold, Thomas Oliver, timescale, vanessa huxter, Vibrational, vibrational coherences

Berkeley Study Provides Unprecedented Details on Ultrafast Processes in Diamond Nitrogen Vacancy Centers

From supersensitive detections of magnetic fields to quantum information processing, the key to a number of highly promising advanced technologies may lie in one of the most common defects in diamonds. Researchers at the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley have taken an important step towards unlocking this key with the first ever detailed look at critical ultrafast processes in these diamond defects. (more…)

Flawed Diamonds: Gems for New Technology

By Guest PostOctober 4, 2013Scienceatom, carbon atom, crystal structure, data storage, Diamond, diamonds, dmitry budker, edward muybridge, electronic properties, femtoseconds, flawed diamonds, galloping horses, gems, graham fleming, molecule, nanosecond, new technology, nitrogen vacancy center, optical, quantum computing, three dimensional lattice, ua, ultrafast spectroscopy, university of arizona, vanessa huxter, vibrational mode

Using ultra-fast laser pulses, a team of researchers led by UA assistant professor Vanessa Huxter has made the first detailed observation of how energy travels through diamonds containing nitrogen-vacancy centers – promising candidates for a variety of technological advances such as quantum computing.

A team of researchers led by University of Arizona assistant professor Vanessa Huxter has made the first detailed observation of how energy travels through diamonds that contain nitrogen-vacancy centers – defects in which two adjacent carbon atoms in the diamond’s crystal structure are replaced by a single nitrogen atom and an empty gap. (more…)

The Next Big Step Toward Atom-Specific Dynamical Chemistry

By Guest PostJanuary 8, 2012Science2p orbitals, 2s orbitals, advanced light source, ali belkacem, america, atomic levels, atoms, berkeley lab, chemical bonding, chemical energy, chemistry, complex systems, components, electrical conductivity, electron, electronic spectroscopy, electronic states of neon, emergence, energy flow in photosynthesis, evolution of energy, fels, femtoseconds, free electron lasers, graham fleming, harmonics, high frequency x rays, molecular level, molecules, nonlinear, nonlinear multidimensional spectroscopy, nonlinear spectroscopic technique, orbitals, photon flux, positive charge, pulse, quadrillionths of second, s orbitals, spectroscopy, stimulated coherent raman scattering, sunlight energy, synchrotron light sources, table top laser, ultraviolet light, valence electrons, valence shell, x ray lasers, x ray photon, x ray spectroscopy, x-rays

*Berkeley Lab scientists push chemistry to the edge, testing plans for a new generation of light sources*

For Ali Belkacem of Berkeley Lab’s Chemical Sciences Division, “What is chemistry?” is not a rhetorical question.

“Chemistry is inherently dynamical,” he answers. “That means, to make inroads in understanding – and ultimately control – we have to understand how atoms combine to form molecules; how electrons and nuclei couple; how molecules interact, react, and transform; how electrical charges flow; and how different forms of energy move within a molecule or across molecular boundaries.” The list ends with a final and most important question: “How do all these things behave in a correlated way, ‘dynamically’ in time and space, both at the electron and atomic levels?” (more…)

For the First Time Ever, Scientists Watch an Atom’s Electrons Moving in Real Time

By Guest PostAugust 7, 20106 commentsScienceabdallah azzeer, atom, attosecond absorption spectroscopy, berkeley lab, electron motion, electrons, eleftherios goulielmakis, garching, graham fleming, krypton atom, laser light, lawrence berkeley national laboratory, max planck institute, mpq, oscillations, quantum optics, robin santra, stephen leone, zhi-heng loh

An international team of scientists led by groups from the Max Planck Institute of Quantum Optics (MPQ) in Garching, Germany, and from the U.S. Department of Energy’s Lawrence Berkeley National Laboratory and the University of California at Berkeley has used ultrashort flashes of laser light to directly observe the movement of an atom’s outer electrons for the first time.

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Tag Archives: graham fleming

Dynamic Spectroscopy Duo

Diamond Imperfections Pave the Way to Technology Gold

Flawed Diamonds: Gems for New Technology

The Next Big Step Toward Atom-Specific Dynamical Chemistry

For the First Time Ever, Scientists Watch an Atom’s Electrons Moving in Real Time