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Lasers, LEDs & Light Sources Newsletter [2009-09-18] |
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Thursday, September 17, 2009  For the first time, researchers have imported a light-controlled “on-off switch” from plants into a mammalian cell to instantly control a variety of cell functions by creating a hybrid protein that causes mouse cells to move in response to laser light. “This is a powerful tool for cell biology and cancer research,” said Wendell Lim, a professor in the University of California, San Francisco department of cellular and molecular pharmacology and a Howard Hughes Medical Institute researcher.
 A new type of nanoscale laser can concentrate light into an area one-hundredth the size of the smallest spot that can be produced by a conventional laser -- a space smaller than a single protein molecule. The breakthrough breaks new ground in the field of optics.
Physical Sciences Inc. (PSI) acquired College Park, Md.-based Maxion, a maker of long-wavelength (3-12 µm) infrared semiconductor lasers, including quantum cascade lasers (QCLs), interband cascade lasers and related systems, for an undisclosed amount. Maxion develops long-wavelength (3-12 µm) infrared semiconductor lasers, including QCLs, interband cascade lasers (ICLs) and related systems.
 By printing large arrays of ultrathin, ultrasmall inorganic LEDs and interconnecting them using thin-film processing, materials scientists at the University of Illinois combined the advantages of both inorganic and organic LEDs for use in lighting and display systems with interesting properties, such as see-through construction and mechanical flexibility.
 A new technology uses flashes of laser light to remotely create underwater acoustics and has the potential to expand and improve both naval and commercial underwater acoustic applications, including undersea communications, navigation and acoustic imaging. Efficient conversion of light into sound is achieved by concentrating the light sufficiently to ionize a small amount of water, which then absorbs laser energy and superheats.
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