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Tunable graphene device puts terahertz to work

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Ashley N. Paddock, [email protected]

A microscale graphene device that responds strongly to terahertz light and that can be precisely tuned is the first tool in a kit for putting terahertz light to work. At the heart of the device, developed by scientists at Lawrence Berkeley National Laboratory and the University of California, is an array composed of graphene ribbons millionths of a meter wide. The varying width of the ribbons and the concentrations of their charge carriers have enabled the scientists to control the collective oscillations, or plasmons, of electrons within the microribbons, said Feng Wang, assistant...Read full article

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    Published: November 2011
    Glossary
    astronomy
    The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
    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.
    polarization
    Polarization refers to the orientation of oscillations in a transverse wave, such as light waves, radio waves, or other electromagnetic waves. In simpler terms, it describes the direction in which the electric field vector of a wave vibrates. Understanding polarization is important in various fields, including optics, telecommunications, and physics. Key points about polarization: Transverse waves: Polarization is a concept associated with transverse waves, where the oscillations occur...
    2-D systemsAdvanced Light SourceAmericasastronomyBasic ScienceCaliforniaDirac electron characteristicsFeng Wanggraphenegraphene plasmon resonancegraphene plasmonicsgraphene ribbonsinfrared spectrometerLawrence Berkeley National LaboratorymetamaterialsmicroribbonsnanooscillationPlasmon resonanceplasmonspolarizationResearch & Technologysemiconductorssilicon-oxide substratespectroscopyTech Pulseterahertz absorptionterahertz lightTest & MeasurementUniversity of California Berkeley

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