太赫兹光子晶体波导传输特性研究-豆柴文库

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太赫兹光子晶体波导传输特性研究
Title:ResearchonTerahertzPhotonicCrystalWaveguideTransmissionCharacteristics
Abstract:
Terahertz(THz)technologyhasreceivedsignificantattentionduetoitspotentialinvariousapplicationssuchaswirelesscommunication,medicalimaging,andsecurityscreening.Theefficientandlow-losstransmissionofTHzwavesiscrucialintheseapplications.ThispaperpresentsacomprehensivestudyonthetransmissioncharacteristicsofTHzwavesinphotoniccrystalwaveguides.TheaimistounderstandthebehaviorofTHzwavesatthesubwavelengthscaleanddevelopstrategiestoenhancetheirtransmissionefficiency.
1.Introduction:
Terahertzwaves,alsoknownasT-wavesorTHzradiation,occupythefrequencyrangebetweenmicrowaveandinfraredradiation.Theyhaveuniquepropertiesthatmakethemattractiveformanyapplications.However,conventionaltransmissionmethodsencounterchallengesduetohighabsorption,diffraction,andscatteringlosses.PhotoniccrystalwaveguidesofferapromisingsolutionforefficientTHzwavetransmissionbyconfiningandguidingthewaveswithinaphotoniccrystalstructure.
2.FundamentalsofPhotonicCrystalWaveguides:
Photoniccrystalsareartificialperiodicstructuresthathaveforbiddenbandsorbandgaps,whichpreventthepropagationofcertainwavelengths.Byintroducingdefectsormodifyingthestructure,waveguidescanbeformedwithinthephotoniccrystal,allowingthepropagationofspecificfrequencies.Thissectiondiscussesthedesignprinciplesandoperatingmechanismsofphotoniccrystalwaveguides.
3.ModelingandSimulationTechniques:
ToanalyzethetransmissioncharacteristicsofTHzwavesinphotoniccrystalwaveguides,variousmodelingandsimulationtechniquesareemployed.Finite-differencetime-domain(FDTD)method,planewaveexpansion(PWE)method,andfiniteelementmethod(FEM)arecommonlyusedtoexplorethebehaviorofTHzwavesandoptimizethedesignofphotoniccrystalwaveguides.
4.TransmissionEnhancementStrategies:
SeveralstrategiescanbeemployedtoenhancethetransmissionefficiencyofTHzwavesinphotoniccrystalwaveguides.Theseincludedefectengineering,tapering,modematching,andcouplingwithotherwaveguidestructures.Thissectionexplore