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Ultrafast Beam-Steering Achieved for Incoherent Light

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JOEL WILLIAMS, ASSOCIATE EDITOR
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A research team at Sandia National Laboratories has demonstrated a technique that dynamically steers light pulses from conventional incoherent light sources. The ability to control incoherent light with a semiconductor device could allow low-power, low-cost sources such as LEDs or flashlight bulbs to replace laser beams in technologies such as holograms, remote sensing, self-driving cars, and high-speed communication. So-called incoherent light, which is emitted by sources such as incandescent light bulbs and LEDs, takes its name because the photons are emitted with different...Read full article

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    Published: April 2023
    Glossary
    holography
    Holography is a technique used to capture and reconstruct three-dimensional images using the principles of interference and diffraction of light. Unlike conventional photography, which records only the intensity of light, holography records both the intensity and phase information of light waves scattered from an object. This allows the faithful reproduction of the object's three-dimensional structure, including its depth, shape, and texture. The process of holography typically involves the...
    augmented reality
    Augmented reality (AR) is a technology that integrates digital information, typically in the form of computer-generated graphics, images, or data, with the real-world environment in real-time. AR enhances the user's perception of the physical world by overlaying or combining digital content onto the user's view of the real world, often through devices like smartphones, tablets, smart glasses, or specialized AR headsets. Key features and principles of augmented reality: Real-time...
    semiconductor
    A semiconductor is a type of material that has electrical conductivity between that of a conductor and an insulator. In other words, semiconductors have properties that are intermediate between metals (good conductors of electricity) and insulators (poor conductors of electricity). The conductivity of a semiconductor can be controlled and modified by factors such as temperature, impurities, or an applied electric field. The most common semiconductors are crystalline solids, and they are...
    incoherent
    In optics, the term denoting the lack of a fixed phase relationship between two waves. If two incoherent waves are superimposed, interference effects cannot last longer than the individual coherent times of the waves.
    Research & TechnologyLight SourcesLasersLEDsbeam steeringOpticsholographyaugmented realitySandia National LaboratorySandiaIgal BrenerPrasad Iyerincoherent lightcoherent lightNature Photonicssemiconductormetasurfacequantum dotDepartment of EnergyUnited StatesOffice of ScienceAmericaslight propertiescoherenceincoherentTechnology News

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