光电子材料导论-光子晶体

PhotonicCrystalFibers:NonlinearandActiveDevicesOutline•NonlinearPhotonicCrystalFibers•DispersiondesignusingsimplePCFs•HybridandpolarisationmaintaininghighlynonlinearPCFs•LiquidcrystalsinPCFs•BandGapguidanceinLCPBGfibres•ThermaltunabilityinLCPBGfibres•ElectricallytunablePBGguidance•OpticaltunabilityofLC-PCFcomponentsHighlightsinthehistoryofcrystalfibres-Low-losssingle-modefibresfromundopedsilica(Kaiseretal.,BellSyst.Tech.J.,53,1974)-Thephotonicbandgapeffectwasfirstdescribed(Yablonovitch,John,Phys.Rev.Lett,58,1987)-Fibreshavingaphotoniccrystalcladdingdemonstrated(Knightetal.,Opt.Lett.,21,1996)-Firstphotonicbandgapguidancedemonstratedinanopticalfibre(Knightetal.Science,282,1998)-Numerousresultsonphotoniccrystalfibresfrom1999to2004.NonlinearPhotonicCrystalFibresDispersion–ThekeyparameterMaterialdispersionofpuresilicaDispersionofstandardopticalfibresDispersionofsimplePCFsDispersioncomponentsofPCFsDispersioncontrolusingpitchvariationDispersioncontrolusingholevariationZero-dispersionwavelengthlimitsOperationalrangeofsimpleHNL-PCFFirstSingle-mode800nmFibresFibresfor1060nmoperation(YAGsyst.)ThenonlineartelecomfibreFirstPCFwithzerodisp.at1550nmFirstPCFwithzerodisp.at1550nmDispersionSlopeControlHybridtriangularcoredesign:NL-PCFHybridtriangularcoredesign:NL-PCF800nmPolarisationMaintainingFibre800nmPolarisationMaintainingFibre800nmPolarisationMaintainingFibreApplicationsofsupercontinuumHybridmicrostructuredfibresThermotropicLiquidCrystalsLiquidCrystalPBGFibresLiquidCrystalPBGFibresSimulationofLCPBGsLinearresponseofPBGsILinearresponseofPBGsIINonlinearresponseofPBGsINonlinearresponseofPBGsIINonlinearresponseofPBGsIIINonlinearresponseofPBGsIIIIE-fieldcontrolledfieldcontrollednematicnematicliquidcrystalsliquidcrystalsExperimentalsetupTransmissionpropertiesITransmissionpropertiesIIResponsetimesOpticalmodulationindyedopednematicLCPCFsDynamicsofopticallytunedLCPCFsSummary