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Laser Zap Brightens Bulbs

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ROCHESTER, N.Y., June 1, 2009 -- Firing a beam from an ultrapowerful laser onto the filament of an incandescent bulb can double its brightness without increasing its energy consumption, according to optics researchers at the University of Rochester. The laser process creates a unique array of nano- and microscale structures on the surface of a regular tungsten filament — the tiny wire inside a light bulb — and these structures make the tungsten become far more effective at radiating light. The process could make a light as bright as a 100-W bulb consume less electricity than a 60-W bulb while remaining far cheaper and...Read full article

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    Published: June 2009
    Glossary
    light
    Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm. In photonic applications light can be considered to cover the nonvisible portion of the spectrum which includes the ultraviolet and the infrared.
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    radiation
    The emission and/or propagation of energy through space or through a medium in the form of either waves or corpuscular emission.
    wavelength
    Electromagnetic energy is transmitted in the form of a sinusoidal wave. The wavelength is the physical distance covered by one cycle of this wave; it is inversely proportional to frequency.
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