亚波长金属光学天线的设计及分析

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1、北京交通大学硕士学位论文亚波长金属光学天线的设计及分析姓名：张国廷申请学位级别：硕士专业：光通信与移动通信指导教师：刘娟20071201』I盛窒适厶黧亟!：堂位迨塞生塞擅要四、应用一个缝槽结构来说明由槽结构产生的表面波沿着表面传播通过缝后的传播特性。试图对SPP的物理机理进行初步研究。关键词：超强光透射；局域场增强；聚焦光；边界元法；光学天线。韭童盒适厶堂亟!：堂位监塞△垦S!曼△￡!ABSTRACTABSTRACT：Sincethereportofextraordinarytransmissionoflightthroughsubwavelengthholearrayson

2、ametalfilmin1998byEbbeseneta1．，therehasbeengreatmterestintheopticalpropertiesofnanostructuredmetallicsystemfortheirrichunderlyingphysicsmechanismandnovelapplication．Astheearlyexperimentswerecarriedoutonmetalfilms，surfaceplasmonpolaritonswereintroducedtoexplaintheanomalouslyhightransmission,

3、otherinterpretation，suchasbasedon‘dynamicaldiffraction’inperiodicslitandholearraysorvariouskindsofresonantcavitymodesinone-dimensionalslitsandslitarrayshavealsobeenproposed．Reassessmentoftheformerexperimentsdatabynewnumericalstudiesandmeasurements，therehasbeenanewmodelcalledcompositediffrac

4、tedevangscentwavemodeltoexplainthephenomenon．Untillnow,thereisnoacertainconclusionforthefantasticopticalphenomenon．Itisusefulforutilizingtheopticalphenomenontorevealtheunderlyingphysicsmechanism．，However,basedonthegoverningsurfaceplasmonpolaritoaspropagationonthesurfacesofsuchnanostructures

5、ystem,alargevarietyofopticalphenomena,suchasbeaming，focusing，splitting，andguidingoflight，havebeentheoreticallypredictedandexprimentallydemonstrated．Andatthesametime，SPP-basednanophotonicelementssuchaswaveguide，lense，reflectorsandbeamsplittershavebeenproposed．TheresearchersarefocusingOilthep

6、hysicsmechanismandthedesignoftheopticaldevice．So，inthisthesis，weappliedthenumericalmethodtoinvestigatethephysicmechanismanddesignaopticalantenna．Themainworl口a托asfollows：1．WeappliedtheBoundaryElementMethod(BEM)toinvestigatetheinteractionoflightwithsinglemetallicnanoparticlehavingdifferentrad

7、ius,andtheinteractionoflightwithcoupledmetallicnanoparticlcs．Theresultshowsthatthereisdifferentresonantwavelengthandfielddistributionforthedifferentsinglemetallicnanoparticlewithdifferentradius．Forthreecoupledmetallicnanoparticles，itwillbehavingdifferent