硅基多縫納米線定向耦合器光波特性的表征、模擬及其在全光邏輯門中的應用研究.pdf

1、東南大學碩士學位論文硅基多縫納米線定向耦合器光波特性的表征、模擬及其在全光邏輯門中的應用研究姓名：李文亮申請學位級別：碩士專業(yè)：電子科學與技術(shù)；物理電子學指導教師：肖金標20120514AbstractAll—opticallogicgatesarekeyphotonicsdevicesforbuildingfuturehi曲一capacityandultrahigh—speedopticalcommunicationnetwork，o

2、pticalcomputingandall—opticalsignalprocessingsystem，inwhichtheyperformarangeofessentialopticalsignalprocessingfunctionssuchaslabelswapping，dataencodingandencryption，paritychecking，headerrecognition，decisionmaking，demulti

3、plexingandSOonDirectionalcouplerisoneofthemostrepresentativeopticalelementsthatcanbeusedforvariousall—opticalsignal—processingoperationsInthisthesis，anovelschemeforallopticallogicgatesbasedonthedirectionalcouplerispropos

4、ed，wherethedirectionalcouplerisbasedonmultipleslottedsiliconwireswiththeKerrtypenonlinearitymaterialfilledinslotregionsNOTOR，andANDlogicgatesCanberealizedbyasingleopticaldirectionalcouplerconfigurationTheopticalcharacter

5、isticsofthelinearopticaldirectionalcouplercomposedoftriple—slottedsiliconwiresarethoroughlyanalyzedbyusingafullvectorialfiniteelementmethodandfull—vectorialbeampropagationmethodThecouplinglengthofthedirectionalcouplerasf

6、unctionsofthestructuralparametersisobtainedandthestrongly—hybridnatureoftheguided—modesiseffectivelydemonstratedTheresultsshowthatproperlychoosingthestructuralandmaterialparameters，couplinglengthsforbothpolarizedmodesare

7、thesame，sopolarization—independentdirectionalcouplerscanberealizedBesides，theinfluenceofthestructuralparametersonthebirefringentbehaviorsandthecouplingefficiencyarealsopresentedThesimulationresultscallbeusedinapplication

8、sBasedontheaboveanalysisofthelineardirectionalcouplerthenonlinearperformancesofthenonlineardirectionalcouplerwiththeKerrtypenonlinearitymaterialfilledinslotregionsarestudiedTheinfluenceonthefieldconfinementofthevariation

9、ofthestructuralparametersisinvestigatedTheminimumeffectiveareacanbeachievedbyoptimizingthestructureproperlytoenhancetheKerrnonlineareffectsofthesiliconwiresOntheconditionthatthedirectionalcouplerCanrealizepolarizationind

10、ependentoperationinlinearregime，wefurtherstudyitsunusualnonlinearswitchingpropertiesandthetransmissioncharacteristicsoflightwaveindifferentpolarizationstatesThesinglenonlineardirectionalcouplerbasedontriple—slottedsilico

11、nwiresisutilizedtoconstructallopticallogicgatesByproperlychoosingpolarizationstatesoftheinjectedfieldsanditsinput／outputchannels，theBooleanlogicoperationsNOTORandANDcanbeachievedKeywords：directionalcouplers，siliconnanowi