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SOI基光耦合器与二维光子晶体研究.docx

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SOI基光耦合器与二维光子晶体研究 Abstract Silicon-on-insulator(SOI)basedopto-couplersandtwo-dimensional(2D)photoniccrystals(PCs)aretwoimportantfieldsinphotonics.Inthispaper,wereviewrecentdevelopmentsintheseareas.WebeginbydiscussingthebasicsofSOIbasedopto-couplers,includingtheirdesign,fabrication,andperformance.WethendiscusstheadvantagesanddisadvantagesoftwodifferenttypesofSOIopto-couplers,namely,waveguideandsurfacecouplingtypes.WehighlightrecentresearchinvolvingSOI-basedopto-couplers,includingtheiruseinsensingandcommunicationapplications.Wethenmoveonto2DPCs,whichareperiodicstructuresconsistingofaregulararrayofdielectricmaterialswithperiodicityonthescaleofthewavelengthoflight.Wediscussthepropertiesof2DPCs,includinghowtheirbandstructureisaffectedbyfactorssuchasstructureandgeometry.Wealsohighlightrecentresearchon2DPCs,includinghowtheyarebeingusedinvariousapplications,suchassensing,filtering,andcommunication.Finally,weconcludewithsomethoughtsonthefuturedirectionsofresearchintheseareas. Introduction Silicon-on-insulator(SOI)basedopto-couplersandtwo-dimensional(2D)photoniccrystals(PCs)aretwoimportantfieldsinphotonics.Opto-couplersareimportantdevicesforsensingandcommunicationapplications,while2DPCshavemanyapplicationsinphotonics,includingsensing,filtering,andcommunication.Inthispaper,wereviewrecentdevelopmentsinthesetwoareas,beginningwithSOIbasedopto-couplers. SOIbasedopto-couplers SOIbasedopto-couplersaredevicesthatuselighttotransfersignalsbetweenelectroniccircuits.Theyconsistofawaveguide,whichdirectsthelight,andadetector,whichconvertsthelightintoanelectricalsignal.TherearetwotypesofSOIopto-couplers:waveguideandsurfacecouplingtypes. Waveguidecouplingtype WaveguidecouplingtypeSOIopto-couplersconsistofawaveguideandadetector.Thewaveguideismadeofsiliconandiscoveredbyalayerofinsulatingmaterial,suchassilicondioxide.Thedetectorismadeofsiliconandisplacednexttothewaveguide.Whenlightisintroducedintothewaveguide,ittravelsdownthewaveguideandinteractswiththedetector,whichconvertsthelightintoanelectr