Graphene-loaded metal wire grating for deep and broadband THz modulation in total internal reflection geometry-中国期刊网

摘要 Weemployedametallicwiregratingloadedwithgrapheneandoperatingintotalinternalreflection(TIR)geometrytorealizedeepandbroadbandTHzmodulation.Thenon-resonantfieldenhancementeffectoftheevanescentwaveinTIRgeometryandinthesubwavelengthwiregratingwascombinedtodemonstratea-77%modulationdepth(MD)inthefrequencyrangeof0.2–1.4THz.ThisMD,achievedelectricallywithaSiO2∕Sigatedgraphenedevice,was4.5timeshigherthanthatofthedevicewithoutametalgratingintransmissiongeometry.Byoptimizingtheparametersofthemetallicwiregrating,therequiredsheetconductivityofgraphenefordeepmodulationwasloweredto0.87mS.ThisworkhaspotentialapplicationsinTHzcommunicationandreal-timeTHzimaging.

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Graphene-loaded metal wire grating for deep and broadband THz modulation in total internal reflection geometry

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Graphene-loaded metal wire grating for deep and broadband THz modulation in total internal reflection geometry

来源期刊

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