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Lawrence Berkeley National Laboratory News
Researchers Probe Graphene Alternatives with SHG
BERKELEY, Calif., May 7, 2014 — Scientists have a new way to study the optical and electric properties of 2-D metals that could compete with graphene in semiconductor and other applications. Using ultrafast IR pulses, researchers with the Lawrence Berkeley National Laboratory observed strong, nonlinear optical resonance along the edges of a single layer of molybdenum disulfide (MoS2). “We … discovered extraordinary second-harmonic light-generation properties that may be used for the in situ monitoring
Ultrabright Nanocrystals Could Image Single Proteins
BERKELEY, Calif., March 19, 2014 — The future is bright in the world of biological imaging with the recent creation of ultrabright, ultrasmall light-emitting crystals that can image single proteins.
A Sticky Approach to Fighting Infection
BERKELEY, Calif., March 6, 2014 — A new nanoscale approach to studying a common source of infection could ultimately lead to the creation of bacteria-resistant materials as a line of defense.
Subsurface Structures Probed via Spectroscopy
BERKELEY, Calif., Jan. 17, 2014 — The hidden junctures where different layers of materials meet could become less mysterious under a new spectroscopy technique developed using the Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory.
For phasing nanocrystals, size really matters
BERKELEY, Calif. – Size is of much greater importance than previously believed in metal nanocrystals undergoing phase transformations, a finding that has important implications for the future design of hydrogen storage systems, catalysts, fuel cells and batteries....
For Phasing Nanocrystals, Size Really Matters
BERKELEY, Calif., Aug. 27, 2013 — Size is of much greater importance than previously believed in metal nanocrystals undergoing phase transformations, a finding that has important implications for the future design of hydrogen storage systems, catalysts, fuel cells and batteries.
Speed Limit for Electrical Switching Revealed
MENLO PARK, Calif., July 31, 2013 — An optical laser pulse has shattered the ordered electronic structure in an insulating sample of magnetite, switching the material to electrically conducting in a picosecond (one-trillionth of a second). The discovery could lead to faster, more...
Light Source Links Vitamin D Deficiency to Accelerated Bone Aging
BERKELEY, Calif., July 23, 2013 — Sunshine may be bad for your skin, but it is good for your bones, and now researchers in California and Germany have discovered that a deficiency in vitamin D — the sunshine vitamin — can accelerate premature bone aging by increasing the risk of...
Metamaterials observe photonic spin Hall effect
BERKELEY, Calif. – A metamaterial surface constructed of V-shaped gold nanoantennas was used to obtain the strongest signal yet of the photonic spin Hall effect – a quantum mechanical optical phenomenon that could play a prominent role in the future of...
Future Looks Sunny for Organic Polymers
HOUSTON, and UNIVERSITY PARK, Pa., May 30, 2013 — Solar cells based on block copolymers, self-assembling organic materials that arrange themselves in distinct layers, could pave the way for a new class of solar energy devices.
Metamaterials Observe Photonic Spin Hall Effect
BERKELEY, Calif., March 22, 2013 — A metamaterial surface constructed of V-shaped gold nanoantennas was used to obtain the strongest signal yet of the photonic spin Hall effect — a quantum mechanical optical phenomenon that could play a prominent role in the future of computing.
Microactuator flexes under laser light
BERKELEY, Calif. – A microscale actuator that flexes like a tiny beckoning finger under a burst of laser light may point toward practical applications in artificial muscles, microfluidics and drug delivery. The Lawrence Berkeley National Laboratory (Berkeley Lab)...
X-Ray Laser Observes Photosynthesis in Action
MENLO PARK, Calif., Feb. 20, 2013 — The structure and chemical behaviors of a natural catalyst involved in photosynthesis were observed simultaneously for the first time, using an x-ray laser. The discovery opens a new window on the way plants generate the oxygen we breathe.
OSA Recognizes Chu as Advocate of Optics
WASHINGTON, Feb. 11, 2013 — US Secretary of Energy Steven Chu is The Optical Society’s 2013 Advocate of Optics. He was recognized at a reception as part of OSA’s annual two-day Leadership Conference in Washington.
Microactuator Flexes Under Laser Light
BERKELEY, Calif., Dec. 17, 2012 — A microscale actuator that flexes like a tiny beckoning finger under a burst of laser light may point toward practical applications in artificial muscles, microfluidics and drug delivery.
W.M. Keck Foundation Grants $1M for Biomedical Research
PORTLAND, Ore., Dec. 14, 2012 — Oregon Health & Science University’s Knight Cancer Institute has secured a $1 million grant to develop microscopy technology to advance biomedical research.
Microscopy Tool Adds ‘Color’ with Nanoscale Resolution
BERKELEY, Calif., Dec. 7, 2012 — Nanoscale objects can now be examined in full color, thanks to a new microscopy tip that delivers chemical details with a resolution once thought impossible. The nanotool could help scientists probe solar-to-electric energy conversion at its most...
Stuart Freedman, Renowned Nuclear Physicist, Dies
BERKELEY, Calif., Nov. 21, 2012 — Stuart Freedman, an investigator of fundamental physical laws and a nuclear physicist with Lawrence Berkeley National Laboratory and the University of California, Berkeley, died unexpectedly Nov. 9 while attending a conference in Santa Fe, N.M. He...
X-ray, optical wave mix probes light at atomic scale
BERKELEY, Calif. – Mixing x-ray and optical lightwaves enables observations of how light interacts with matter on the atomic scale. The capability can reveal certain properties of matter, and may enable the observation of changes during chemical reactions, such as the...
New Solar Research Facility Breaks Ground
BERKELEY, Calif., Oct. 29, 2012 — Construction has begun on a 40,000-sq-ft solar energy research facility at Lawrence Berkeley National Laboratory that will aid in the quest for alternative fuels from sunlight.
Spectroscopy Technique Advances Spintronics
BERKELEY, Calif., Oct. 16, 2012 — An x-ray spectroscopy technique marks a significant step toward removing a major roadblock impeding the use of certain semiconductors in computing, because processing data using electron “spin” rather than charge would mean smaller, faster and more...
New class of 3-D optical cavities demonstrated
BERKELEY, Calif. – Nanoscale three-dimensional optical cavities made from metamaterials can generate the most powerful nanolaser beams to date. This new class of optical cavities, with remarkable electromagnetic properties, holds promise for a variety of other...
X-ray, Optical Wave Mix Probes Atomic-Scale Light
BERKELEY, Calif., Aug. 31, 2012 — A long-awaited technique for watching how light interacts with matter on the atomic scale was demonstrated by mixing x-ray and optical lightwaves. Vision, photosynthesis and solar cells are a few examples of the ways light changes matter, but how...
Quantum Effects Observed in Optomechanical System
BERKELEY, Calif., Aug. 21, 2012 — The first direct observations of distinctly quantum optical effects — amplification and squeezing — have been recorded in an optomechanical system. The step forward points the way to low-power quantum optical devices and enhanced...
Laser ARPES helps explain superconductivity
BERKELEY, Calif. — A new ultrafast laser angle-resolved photoemission spectroscopy (ARPES) technique may soon help scientists realize some of the biggest obstacles to the electronic states of high-temperature superconductors so that they may one day put these...
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