二维光子晶体耦合腔波导结构与慢光特性分析

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1、万方数据江苏大学硕士学位论文ABSTRACTSincetheconceptofphotoniccrystalisbroughtup，itoffersmuchmoreandbetterchoicesforall—opticalbufferdevice．Inordertoobtainexcellentcacheperformanceandpracticalscheme，utilizingphotoniccrystalwaveguidetoimplementall—opticalbufferdeviceplaysaveryimp

2、ortantroleindevelopingall—opticalnetwork．Becauseoftheuniquenano—structure，attractiveslowlightpropertiesandroom-temperatureoperation，theopticalbufferbasedonphotoniccrystalwaveguidehascapturedmoreandmoreattentionofresearchers．Comparedwithphotoniccrystallinedefectwav

3、eguides，thephotoniccrystalcoupled-cavitywaveguidehasanattractivefeatureofslowlightwithveryflatbandandsmallgroupvelocity,whichCanbeappliedasopticaldelaylinesandopticalbuffers．Thisdissertation，mainlyconductsthoroughresearchonthepropertiesofslowlightinphotoniccrystal

4、coupled-cavitywaveguide．Wedesignanumberofdifferentstructuralmodels———_thesinglecavity,complexcavityandhalf-periodcavitymodels．Throughofanalysisandcomparison，wefinallyascertainthehalf-periodstructurepossessestheoptimumslowlightperformance．Themajorworkandinnovationo

5、fthepaperincludesthefollowing．1Weestablishthreevariouscavitiesbasedontheconventionalsquarestructure．Fourdifferenttypesofsinglecavitymodelswhoseslowlightcharactersaleinfluencedbythedistancebetweentwocavitiesareinvestigated．Theresultofstudyfoundthat：(1)Themaximumgro

6、upvelocitiesofcavitiesarelinearlydecreasedasthedistancebetweentwocavitiesincreases．WhenL=3a,themaximumgroupvelocityisonlyaround10～C．ThenincreaseLto6a,itCanreducethreeorderofmagnitudeof(2)ThedistributionsofdielectricrodswhichCanexertagreaterimpactontheparametersofs

7、lowlightincoupledcavitiesbasedon3x3squarelatticeareconfirmed．Whenadjiustingtheradiusofcentralrodortheedgerodsinsecondcolumn，thepropertiesofslowlightarelargerchange．2Thestructuresofcomplexcavityalebuilt．ThroughalteringthedistributionsofIII万方数据二维光子晶体耦合腔波导结构及慢光特性研究di

8、electricrodsinwaveguidesystem，wesimulatetheslowlightparametersofthecomplexcavitieswhichutilizethecombinationofsquarecavityandtheotherstructures．Simulati