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Research & Technology News
Theory: Increasing Vibrations Makes SERS More Powerful
LAUSANNE, Switzerland, Nov. 25, 2015 — Surface-enhanced Raman scattering (SERS) could become an even more powerful tool for probing single molecules if those molecules can be made to vibrate more, a theoretical model suggests. SERS is used to identify individual molecules based on their spectral "fingerprints," which are determined by the way light is shifted by the vibrations of atoms inside the molecule. This shift — Raman scattering — is amplified by nanostructured surfaces that confine light in the form of
UK Creates £13M Photonics Manufacturing Hub
SOUTHAMPTON, England, Nov. 24, 2015 — More than 40 U.K. companies will take part in a photonics manufacturing research center to be led by the University of Southampton. The Future Photonics Hub will provide national leadership in manufacturing for next-generation photonics technologies...
Laser Cools Liquid for First Time
SEATTLE, Nov. 24, 2015 — A near-infrared laser has been used to cool water by more than 10 °C in what is believed to be the first instance of laser cooling in a liquid. A team of researchers from the University of Washington used a tunable CW laser to trap an...
Purdue Assembles Label-Free Imaging Research Team
WEST LAFAYETTE, Ind., Nov. 23, 2015 — As part of its strategic growth plan, Purdue University's College of Engineering has appointed a research team to develop label-free spectroscopic sensing techniques. Label-free imaging foregoes fluorescent dyes and other time-consuming sample...
Bell Labs Proposes Multiplexing Scheme for Petabit Communications
MURRAY HILL, N.J., Nov. 23, 2015 — A new multiplexing scheme could allow optical networks to transmit data at petabits per second — creating enough capacity to allow two-thirds of the U.S. population to simultaneously stream HD movies over a single optical fiber. Real-time...
Calibration Sharpens Superresolution Microscopes
STANFORD, Calif., Nov. 23, 2015 — Superresolution microscopes can be made even sharper with arrays of nanoscale apertures that compensate for optical aberrations more effectively than previous techniques. The arrays allow for more accurate tracking of individual molecules in 3D,...
Viral Method Aids Two-Photon Imaging of Primate Brains
WAKO, Japan, Nov. 20, 2015 — Tailored viruses that make brain cells manufacture fluorophores could make two-photon microscopy techniques viable for studying primate brains. Tested first in marmosets, the technique could for the first time allow scientists to neural activity...
Application Note: Raman Microscope Probes Semiconductor Defects
NISHINOMIYA, Japan, Nov. 20, 2015 — Using Raman microscopy to study flaws in the crystal structure of semiconductors could lead to better epitaxial growth processes that would make the materials more energy efficient when used in electronic devices. Using a Raman microscope from...
Projector Would Keep Up with Moving Surfaces
SUITA, Japan, Nov. 19, 2015 — A proposed projection mapping technique would make light stick to moving objects like paint. Proposed by professors Daisuke Iwai and Kosuke Sato of Osaka University, the technique relies on a camera system to track the movements of the object being...
Kirigami Helps Solar Cells Track the Sun
ANN ARBOR, Mich., Nov. 18, 2015 — Kirigami, the ancient Japanese art of paper cutting, could help create flexible solar cells that track the sun to generate more electricity than stationary panels. With help from an art professor, researchers at the University of Michigan recently...
IR Thermography May Help Diagnose Joint Inflammation
JOENSUU, Finland, Nov. 18, 2015 — Noninvasive, low-cost IR thermography may be effective for imaging joint inflammation and also shows promise for assessing ergonomic problems caused by office work. A study at the University of Eastern Finland evaluated the capability of IR...
UV Light Powers Nanosubmersible Motors
HOUSTON, Nov. 17, 2015 — Single-molecule machines that move through fluids with UV light-powered motors could someday carry cargo for medical and other applications. Microscopic machines with motors have been developed over the years, said Rice University professor James...
Laser Method Would Heat Fusion Materials Faster
LONDON, Nov. 16, 2016 — Directly targeting ions with lasers could heat certain materials to 1 KeV — equivalent to more than 10 million °F — in 20 fs, or 100 times faster than previously demonstrated. The method, proposed by researchers from Imperial College...
Optofluidic Systems Detect Ebola, Flu Viruses
SANTA CRUZ, Calif., Nov. 16, 2015 — A chip-scale hybrid device integrates a microfluidic chip for sample preparation and an optofluidic chip for optical detection of Ebola and other viral pathogenic RNA molecules. A small, dedicated optofluidic chip was also demonstrated for the...
Application Note: Temperature-Controlled Stages Avoid Heat Damage to Cells
BRISTOL, England, Nov. 13, 2015 — Temperature-controlled stages have been used to fend off heat damage to cells caused by illumination in correlative light and electron microscopy (CLEM) experiments. A research group at the University of Bristol used stages from Linkam Scientific...
Osram Will Invest €3B in LED Chip Plant, R&D Projects
MUNICH, Nov. 13, 2015 — Osram Licht AG plans to invest &euro3 billion (about $3.22 billion) in LED and laser lighting technologies and applications by 2020. “Following a phase of strategic realignment, we are now launching the ‘Diamond’ innovation and...
Nanotweezers Increase Velocity of Particle Transport
WEST LAFAYETTE, Ind., Nov. 12, 2015 — Nanotweezers that exploit plasmonics, heat and an electrical field flow overcome previous limitations caused by weak convection properties. The nanotweezer system uses a nanoantenna to concentrate and absorb light, creating plasmonic hotspots, which...
Sir Richard Friend Awarded for Plastic Electronics Contributions
WARRENDALE, Pa., Nov. 12, 2015 — Sir Richard H. Friend is the recipient of the 2015 Von Hippel Award for his pioneering research on polymeric semiconducting materials, which has helped drive advances in LED and solar cell technology. In the 1980s, Friend initiated a research...
'Golden Window' Eyed for Deeper Tissue Imaging
NEW YORK, Nov. 12, 2015 — Longer wavelengths in the near-infrared range may offer a "golden window" for noninvasive but deep imaging of brain and breast tissue, City College of New York researchers have proposed. Current one- and two-photon fluorescence imaging techniques...
Plasmonic Absorbers Capture Specific Wavelengths
DURHAM, N.C., Nov. 11, 2015 — An experimental fabrication technique has created perfect absorbers for small bands of the electromagnetic spectrum from visible light through the near-infrared. The technique could allow advanced thermal imaging systems to be produced more quickly...
'Invisible' Graphene Layer Protects Nanowires from Radiation Damage
WEST LAFAYETTE, Ind., Nov. 10, 2015 — Wrapping silver nanowires in a one-atom-thick layer of graphene protects the structures from radiation damage that has historically prevented their use on a commercial scale. "The damage occurs in medical imaging, in space applications and just from...
Optogenetics Pioneers Ed Boyden, Karl Deisseroth, Gero Miesenböck Garner International Research Prizes
SAN FRANCISCO and MAINZ, Germany, Nov. 10, 2015 — Three optogenetics researchers have been recognized with international awards for their pioneering work on controlling cells with light. Ed Boyden, of the Massachusetts Institute of Technology, and Karl Deisseroth, of Stanford University and the...
Plastic Fluorescence Microscope Brings Diagnostic Care to Rural Poor
HOUSTON, Nov. 9, 2015 — A miniature plastic digital fluorescence microscope that can quantify white blood cell levels in patients aims to improve disease detection in rural parts of the world. The inexpensive point-of-care device examines blood smears, allowing health care...
NASA Exploring Freeform Optics for Compact Space Telescopes
GREENBELT, Md., Nov. 6, 2015 — Freeform optics technology allows telescope mirrors to take almost any shape, potentially improving image quality over a larger field of view. Prompted by advances in computer-controlled fabrication and testing, NASA engineers are now using freeform...
Laser-Machined Microresonators Offer Efficient SHG
SHANGHAI, Nov. 6, 2015 — Femtosecond laser micromachining and other processes can create smaller optical resonators out of lithium niobate (LN), potentially allowing their integration into chip-scale sensors. Whispering-gallery-mode (WGM) microresonators developed at the...
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