Photo-Doped Active Electrically Controlled Terahertz Modulator-中国期刊网

摘要 Wedemonstrateanelectric-controlledterahertz(THz)modulatorwhichcanbeusedtorealizeamplitudemodulationofterahertzwaveswithslightphoto-doping.TheTHzpulsetransmissionwasefficientlymodulatedbyelectricallycontrollingthemonolayersilicon-baseddevice.Themodulationdepthreached100%almostwhentheappliedvoltagewas7Vatanexternallaserintensityof0.6W/cm2.Thesaturationvoltagereducedwiththeincreaseofthephoto-excitedintensity.InaTHzcontinuouswave(CW)system,asignificantfallinbothTHztransmissionandreflectionwasalsoobservedwiththeincreaseofappliedvoltage.ThisreductionintheTHztransmissionandreflectionwasinducedbytheabsorptionforelectroninjection.Theresultsshowthatahigh-efficiencyandhighmodulationdepthbroadbandelectric-controlledterahertzmodulatorinapureSistructurehasbeenrealized.

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Photo-Doped Active Electrically Controlled Terahertz Modulator

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Photo-Doped Active Electrically Controlled Terahertz Modulator

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