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RALEIGH, N.C., April 29, 2008 -- An advance that better explains how light interacts with matter could eventually lead to faster, more efficient computers. North Carolina State University physics professor David Aspnes, PhD, and research associate Eric Adles, PhD, conducted research on second-harmonic generation, or how wavelengths of light are shortened upon interaction with materials. Aspnes said that the research could be used to further our understanding of how materials bond to each other -- such as silicon and next-generation insulating materials for integrated circuit technologies. By helping researchers...Read full article

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    Published: April 2008
    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.
    optical
    Pertaining to optics and the phenomena of light.
    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...
    second-harmonic generation
    Second-harmonic generation (SHG) is a nonlinear optical process that occurs when two photons with the same frequency combine within a nonlinear material, resulting in the generation of a new photon with twice the frequency (and therefore half the wavelength) of the original photons. This phenomenon is a specific case of second-order nonlinear optical effects. Key points about second-harmonic generation include: Nonlinear optical process: SHG is a nonlinear optical effect, meaning that the...
    atomicBasic SciencecomputersDavid AspnesEric Adlesintegrated circuitsinteractionlightMaterialsmatternanoNews & FeaturesnonlinearNorth Carolina State Universityopticalphotonicssecond-harmonic generationsiliconspectroscopywavelengths

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