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CASTECH INC - New Building the Bridge of Light

Graphene Optical Modulators Could Speed Communications

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BERKELEY, Calif., May 12, 2011 — Digital communications speed limits could soon be broken, thanks to a new graphene-based optical device that could theoretically reach as high as 500 GHz for a single modulator. Xiang Zhang, an engineering professor at the University of California, Berkeley, and a team of researchers built a tiny optical device that uses graphene, a 1-atom-thick layer of crystallized carbon, to switch light on and off. This switching ability is the fundamental characteristic of a network modulator, which controls the speed at which data packets are transmitted. The faster the data pulses are sent out,...Read full article

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    Published: May 2011
    Glossary
    optical modulator
    A multilayered thin-film device used to modulate transmitted light in integrated photonic circuits.
    1-atom-thick layer of crystalline carbonAmericasAndre GeimBasic ScienceBerkeleyCommunicationsdigital communicationelectronsFeng Wanggraphenegraphene-based modulatorsindustrialKonstantin NovoselovLawrence Berkeley National LaboratoryLight SourcesMicroscopyMing LiumirrorsNational Science Foundation Nanoscale Science and Engineering Centernew graphene-based optical deviceoptical modulatorOpticsphotonsResearch & Technologysilicon waveguideultrafast optical communicationUniversity of CaliforniaXiang ZhangXiaobo Yin

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